2 . 当今社会，与人交往越来越成为一种不可或缺的能力，作为中学生，学会如何与人相处尤为重要。假如上周你们班对“如何与人相处”展开了讨论，请根据以下的讨论结果，以“How to get on well with others?”为题，写一篇英语短文。
注意：
(1)词数80左右；
(2)可适当发挥，以使行文连贯；
(3)文中请勿提及你的真实姓名和学校。
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3 . 随着社会的发展，各种发明以及高科技产品成为我们日常生活的必需品，如手机（mobile phone）、数码相机（digital camera）等。请以My Favourite Invention为主题，准备一篇发言稿，主要内容包括：
1.你喜欢的科技产品；
2.喜欢的理由。
注意: 1.词数80左右；
2.开头和结尾已给出，不计入总词数。
Hello, everyone,

I’d like to make a speech with the title: My Favourite Invention.

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That’s all. Thank you.

6 . Revealing the source of Jupiter’s x-ray auroral flares

Abstract

Jupiter’s rapidly rotating, strong magnetic field provides a natural laboratory that is key to understanding the dynamics (动力学) of high-energy plasmas (等离子体). Spectacular auroral (极光的) X-ray flares (耀斑) are diagnostic of the most energetic processes governing magnetospheres but seemingly unique to Jupiter. Since their discovery 40 years ago, the processes that produce Jupiter’s X-ray flares have remained unknown. Here, we report simultaneous (同时的) in situ satellite and space-based telescope observations that reveal the processes that produce Jupiter’s X-ray flares, showing surprising similarities to terrestrial ion aurora. Planetary-scale electromagnetic waves are observed to modulate (调节) electromagnetic ion cyclotron waves, periodically causing heavy ions to precipitate and produce Jupiter’s X-ray pulses. Our findings show that ion aurorae share common mechanisms across planetary systems, despite temporal, spatial, and energetic scales varying by orders of magnitude.

INTRODUCTION

Aurorae, observed from planetary polar regions across the solar system, are displays of light that are produced when energetic particles precipitate along magnetic field lines and transfer their energy to the atmosphere. Jupiter’s soft x-ray aurorae are produced by energetic [~ (MeV) (电子伏)] heavy ions (S and O), originally from the moon Io’s (木卫一的) volcanic activities. The dynamic X-ray emissions often pulse with a regular beat of a few tens of minutes. The spectacular quasi-periodic (准周期性的) auroral pulsations at Jupiter have also been observed in ultraviolet (UV), infrared, and radio emissions. The X-ray aurorae are predominately confined (主要局限于) to the region poleward of Jupiter’s main aurora, connecting to Jupiter’s outer magnetosphere via magnetic field lines. The mapping of the emissions leads to the suggestion that the particle precipitations were driven by magnetic reconnection. However, observations show that the x-ray pulsations last for several Jupiter days or longer, evidencing that the driver may not be a transient process like magnetic reconnection.

To date, 40 years after their discovery, the mechanisms that cause these X-ray aurorae remain unknown. Simultaneous measurements of the magnetospheric environment and the auroral emissions are critical to revealing their driving mechanisms. Here, we present observations of Jupiter’s unique x-ray aurorae with simultaneous in situ measurements from the magnetosphere. In this study, we reveal the physical driver for Jupiter’s pulsating x-ray emissions by analyzing simultaneous in situ measurements from Juno and remote spectroscopic imaging by XMM-Newton telescope (XMM，牛顿卫星) during 16 and 17 July 2017. XMM’s European Photon Imaging Camera (EPIC-pn and MOS) instruments provided spatial, spectral, and timing data of Jupiter for a continuous 26-hour (~2.6 Jupiter rotations) observation from 18:26 UT on 16 July to 22:13 UT on 17 July, which was shifted to account for the ~46-min light travel time between Jupiter and Earth. This XMM observation was planned to coincide with the time when NASA’s Juno spacecraft was moving from 62 to 68 RJ (1 RJ = 71 492 km) radially away from the planet in the Southern Hemisphere in the predawn sector between ~0400 and 0430 magnetospheric local time (MLT).

Ionosphere-magnetosphere (电离层) mapping from previous observations suggested that the origins of Jupiter’s X-ray auroral pulsations occurred at these distances from the planet. Juno provided contemporaneous (同时发生的) in situ measurements from the plasma sheet only when Jupiter’s north magnetic pole tilted to Earth. Therefore, we focus on the northern aurora, for which Juno’s in situ measurements detail what was happening in the plasma sheet during the X-ray pulses. At Jupiter, the analysis of these comparisons between in situ and remote sensing observations is more complex than at Earth. At Earth, during the time scale of an auroral event, typically tens of minutes, a spacecraft in the terrestrial magnetosphere usually travels little (e.g., hundreds of kilometers) in comparison to the spatial scale of a magnetospheric event (e.g., several Earth radii) that would cause a large auroral brightening so that this in situ spacecraft could be magnetically connected to the aurora region over the full auroral lifetime. This is not true for Jupiter, because the footprint of the aurora (which is rotating with Jupiter) with respect to Juno’s location changes substantially during an observation. There are also substantial travel times (a few tens of minutes) along the magnetic field expected from the outer magnetosphere to the Jovian aurora. Therefore, the correlation between a single outer magnetosphere event in Jupiter’s in situ measurements and a single auroral pulse cannot be expected on a one-to-one level basis. Instead, a series of successive events are required to draw reliable careful correlations, with the regular periodicity of the x-ray flares, providing an invaluable diagnostic signature of the source process.

(Adapted from an essay on Science.)

1. What does the essay focus on?

A．The X-ray pulses happening on Jupiter.

B．The formation of the aurora in the pole of Jupiter.

C．The ways to teach people how to appreciate auroras.

D．The process of detecting the X-ray pulses on Jupiter.

2. What will the author present in the next content of the essay?

A．Their conclusions.	B．Their measure to do the research.
C．Discussion of some problems of preciseness.	D．Their acknowledgements.

3. The word “infrared” is underlined and in Italics. What is the meaning of the word?

A．辐射

B．红外线技术的

C．太阳风

D．红外线

4. Which of the followings is NOT TRUE about the auroral flares on Jupiter?

A．The strong magnetic is a good breakthrough point to research the auroral flares.

B．The X-ray pulses will last for several days on Jupiter.

C．The soft X-rays are caused by high-energy ions.

D．The X-ray pulses beat regular on Jupiter.

9 . 阅读下而材料，根据其内容和所给段落开头语续写两段，使之构成一篇完整的短文。

From her lifeguard station at the end of the pool, Jessica noticed clouds forming in the sky. By the time she took a break at 2:30, the wind was picking up and the sky was darkening. The pool manager announced over the loudspeaker that the pool was closing immediately, due to a weather warning. He asked everyone to head to the safety of home before the storm hit.

All of the swimmers had left by 3: 30 except for Jessica's neighbor, eight-year-old Zack Hill. Zack's mother had dropped him off at the pool while she went to work. She had planned to pick him up later, but the storm was coming fast. Jessica decided that she would drop Zack off on her way home. She taped a note for Mrs. Hill on the door of the pool office and headed out.

The minute Jessica and Zack left the parking lot, it was clear that this was no ordinary storm. The wind was very strong, the storm clouds were dark, and the sky had turned a terrible green. The rain hit just as Jessica turned onto her street, Jessica said, “Jack, I'm going to take you to my house. We need to get inside right away, and your house is farther away than mine.”

She pressed the garage-door opener, but nothing happened. The electricity was out. The front door was only a few feet away, but the wind was so strong that Jessica and Zack had to fight their way out of the car and into the house. Jessica held Zack's hand firmly. The door was heavy with the pressure of the wind. Finally, it opened, but it was blown out of Jessica's hand and it hit the side of the house. The window broke into pieces，Jessica picked up Zack and threw the two of them inside; her only thought was to get to a safe place.

注意：
1.续写词数应为150词左右；
2.请按如下格式作答。

Remembering everything she could learn from her emergency training, Jessica took Zack to the basement.

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After a final crash, the sound of the storm grew distant.

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