| A．intention | B．tendency | C．sympathy | D．adaptation |
| A．set aside | B．pick up | C．lay aside | D．pop up |
| A．Devoting herself to | B．Devoted herself to | C．Devoting to | D．Being devoted to |
| A．exterior | B．integral | C．subtle | D．humble |
| A．constantly | B．consequently | C．competitively | D．competently |
| A．ponder | B．invest | C．compete | D．expand |
| A．confusing | B．confused | C．convincing | D．convinced |
| A．motivate | B．clarify | C．approve | D．facilitate |
9 . The second experiment on how to grow crops on Mars and moon soil simulant(模拟装置)has given a surprising outcome. As a result of what the researchers of Wageningen University & Research center in the Netherlands learned from their first experiment, they were able to grow ten different crop species. Tomatoes, peas, rye, garden rocket, radish and garden cress were harvested.
A few improvements have been made since the first experiment. Researcher Wieger Wamelink said, “We used trays instead of original small pots and added organic material (fresh cut grass) to the Mars and moon soil simulant. This solved the problem we had with watering in the first experiment and also added manure(肥料)to the soils.” In particular, the crop growth on the moon soil simulant showed improvement. While in the first moon soil experiment most plants died, in the next round they flourished, and the researchers could harvest from the same species as on the Mars soil simulant and the Earth potting compost(混合肥料)control.
The production of biomass(生物量)on the Mars soil simulant was lower than on Earth control, but it was a minor difference and caused by one of the trays that showed less growth. It was also not statistically different from the Earth control. “That was a real surprise to us,” comments Wamelink. “It shows that the Mars soil simulant has great potential when properly prepared and watered. The biomass growth on the moon soil simulant was less than on both other soils, about half of the biomass. Only the spinach(菠菜)showed poor biomass production.”
Although the researchers harvested several eatable crops, they did not eat them. The soils contain heavy metals like lead, arsenic and mercury and also a lot of iron. If the components become available for the plants, they may be taken up and find their way into the fruits, making them poisonous. Further research on this is necessary and that is one of the reasons why a crowdfunding(众筹)campaign has been started to finance the third experiment that will be all about food safety. If the crops prove to be safe enough to eat, the funders will be invited for dinner where a ‘Martian meal’ will be served that includes the harvested crops; at least for those who dare!
1. What do the researchers gain from the first experiment?| A．They can harvest ten crop species. |
| B．They learn what the organic material is. |
| C．They’re sure that they will succeed next time. |
| D．They learn they have to change the plant containers. |
| A．The process of how to plant crops on soil simulant in the experiment. |
| B．In spite of some drawbacks, the Mars soil simulant has great potential. |
| C．The reasons why the production of biomass on the Mars soil simulant was lower. |
| D．The production of biomass on the Mars soil simulant is obviously different from that on the Earth control |
| A．What they harvested was not eatable. |
| B．They haven’t got enough funding support. |
| C．The crops may contain various poisonous substances. |
| D．The production of the crops was lower than that on the Earth control. |
| A．Crops Grown on Fake Mars and Moon Soil |
| B．Time to Crowdfund Eatable Crops |
| C．Growing Plants on Mars and the Moon |
| D．Colony in Outer-space Becomes Reality |
10 . Massive snowstorms and a blast of chilly air swept across northern China in the first week of November, leaving many people shaking in the freezing cold. At the same time, a global conference on climate change - COP 26 - was held in Glasgow, Scotland, where the key topic was how to control the trend of global warming.
So why are we experiencing such a freezing winter on a warming planet?
The cold snap (寒潮) and global warming, two seemingly opposing forces, are not contradictory, Zhou Bing, chief expert at the China Meteorological Administration’s National Climate Center, told China Daily.
Global warming does not appear evenly, but causes more extreme heat and cold, Zhou explained. Against the backdrop of a warming planet, China has seen a growing average temperature in winter, which has increased by 0.41℃ every decade since 1961. But in some cases, the country has also experienced freezing cold - for instance, the icy weather that hit the country in early 2008.
Global warming has changed the patterns of Earth’s atmosphere circulation, affecting the local climate via sea-air or land-air interaction. In October, La Nina, the periodic cooling of ocean surface temperatures in the central and east-central equatorial (赤道的) Pacific, started to affect China, bringing more cold air to the country, said the National Climate Center. Between 1951 and 2020, a total of 15 La Nina events occurred in China. Ten of them brought lower-than-average winter temperatures, according to the National Climate Center.
Another reason for the chilly weather is the warming Arctic. The Arctic is warming twice as fast as any other place on Earth, according to NPR. The polar vortex (涡流)- a rotating pool of cold, dense air - weakens as the temperature goes up, pushing the cold Arctic air southward.
So will this winter be particularly cold? Unlike a series of cold waves that cool down the nation gradually, people will experience the quick freeze effects several times, and a cold winter is likely, a Beijing-based climate expert told Global Times.
The official forecast also said that northern China will see more snow than average and southern China less rainfall than average.
1. What does the underlined word “contradictory” in paragraph 3 probably mean?| A．opposite | B．common | C．similar | D．connected |
| A．freezing winters are rare in China |
| B．it is becoming warmer in winter |
| C．global warming is not as serious as we thought |
| D．global warming can cause extreme cold |
| A．A rise in temperature. | B．Less rainfall. |
| C．Colder winters. | D．Big storms. |
| A．To describe the phenomena and causes of La Nina. |
| B．To explain the connection between the cold snap and global warming. |
| C．To predict if this winter will be particularly cold. |
| D．To discuss the importance of stopping global warming. |
