With hospitals filled up with COVID-19 patients, NASA has announced it will be delaying an upcoming satellite launch. The liquid oxygen     1     (need) to fuel the flight is also needed in hospitals,     2     doctors use the important resource to keep     3     (dangerous) sick COVID-19 patients alive.

“Medical oxygen is     4     priority (优先) of our members,” says Richard Craig, vice president of technical and regulatory affairs for the Compressed Gas Association.

A shortage of truck drivers     5     the certifications needed to transport the oxygen is only adding to the problem, and there are     6     (concern) about other rocket launches being pushed back as well.

At the recently held Space Symposium in Colorado, SpaceX president Gwynne Shotwell     7     (invite) anyone with access to liquid oxygen to reach out. “We certainly are going to make sure the hospitals are going to have the oxygen that they need but for anybody who has liquid oxygen     8     (spare), send me an email,” she said.

SpaceX founder Elon Musk tweeted that the shortage was “a risk,     9     not yet a limiting factor”. So far, 26 rocket launches     10     (plan) by the company.

Finland wants to have the     1     (world) best education system. It wants to prepare students for the digital age. It wants to put an     2     (emphasize) on digital and workplace skills.     3     example of this will be to use 3D printers in classes for students to make models of things they read about.     4     will also be training in real-life workplaces.     5     (help) the students, their performances will     6     (judge) by a teacher and by a worker from the company. One teacher, Mrs. Harper, explained why a change in educational methods was necessary. She said school was divided into subjects to learn,     7     our brain was not divided into subjects. She said students needed to think     8     (different). They needed to think about the problems in the world. She questioned whether today's students could get the skills to     9     (success) in such an inter-cultural world. She warned it would be a mistake to let children think that the world is simple, and     10     all they need is facts.

Tianwen-1, whose name    1    ( mean)“Quest for Heavenly Truth"， sent back a black and white picture of the red planet, which was taken    2    the probe (深测器) was around 2. 2 million kilometers away from Mars, the CSA said.

Launched in July last year, the probe is China's first mission to Mars. Tianwen-1    3    ( orbit) the planet before landing a rover (登陆车) on the surface, with the hope that it can gather    4    ( importance ) information about geological structure ，environment and atmosphere.

The unmanned probe is around 184    5     ( million) km from Earth and 1. 1 million km from Mars, the CSA said on Friday， adding that the craft    6    (fly) some 197 days and more than 465 million kilometers    7     ( reach) the planet. According lo the scientific team behind Tianwen-1, the probe is “going to orbit, land and release a rover all on the very first try". Tianwen-1 was one of the biggest Mars missions    8    were launched last July, along    9     NASA's Perseverance rover, and the United Arab Emirates' Hope Probe. All three missions were launched simultaneously owing to an alignment (成直线) between Mars and Earth on    10    same side of the sun.

Breaking habits is hard. This is largely because we are constantly exposed to stimuli (刺激物),     1     take control of the reward-based learning system in our brains designed initially for     2     (survive). Reward-based learning, to put it     3     (simple), involves a trigger (诱因), followed by a behavior and a reward. These three components (trigger, behavior and reward) show up every time we do what we desire to do. And then we gradually have the habits.

So why can’t we just control ourselves and decide to replace bad habits with good ones?     4     the fact that researchers show that the brain networks associated with self-control are the first to go “offline” when     5     (face) with triggers such as stress, the doctrine (学说) of self-control     6     (know) for decades. When I was in medical school, I was taught to pass self-control speech on to my patients. “Need to lose weight? Don’t eat junk food. Try to quit     7     (smoke)? Stop it and use a nicotine replacement.”

When I started actually practicing medicine, however, I quickly learned that it is impractical in real life. Self-control theories have missed something     8     (critic): reward-based learning is based on rewards, not behaviors. How rewarding a behavior drives how likely we are     9     (repeat) that behavior in the future, and this is why self-control as     10     approach to breaking habits often fails.

With Windows 11, Microsoft is introducing modern touches to the experience of using a PC.

Most noticeably,     1     new design is meant to help users more quickly get what they're looking for. The changes go beyond the surface, though. Microsoft is changing the rules of its app store to bring more    2    （various）and even bring Android apps to the PC. New touchscreen controls and a better way to configure（安装）windows on screen might make    3    easy to sit in front of the computer for long periods.

Much    4    （be）on the line. Windows is central to Microsoft, as companies use it for their employees' machines and    5    （consumer）use it for entertainment. The current version, Windows 10, is the top PC operating system in the world, and the company doesn't want    6    （lose）that leadership position as it faces competition from Apple and Google.

On Monday, Microsoft    7    （release）its first preview build of the software to people participating in the Windows Insider Program, giving people their first chance to try out what's new.

If you want to test it yourself, go to the Settings app in Windows 10. Just be warned: The software is still new and not very extensively tested,    8    it contains some issues, which means you might have to figure    9    other ways.

If you want to keep Windows bugs to a minimum, then you    10    （probable）shouldn't upgrade yet. Microsoft plans to start rolling out the upgrade more widely later this year and into next year.

In ancient times, the Chinese kite was known as “Zhiyuan”, and was considered to have unique artistic values. It first     1    (appear) in the wars of the Spring & Autumn Period (770 BC - 476 BC). According to historical records, Mo Zi spent three years constructing a     2    (wood) kite, which failed after one day’s flight.     3    book noted that the master carpenter Lu Ban also made several kites which were flown high to spy     4     the enemy.

The technology developed further during the famous Chu-Han War. The general of the Han troops Zhang Liang once ordered his soldiers    5    (fly) kites in the heavy fog around the Chu troops     6    (lead) by Xiang Yu. Children sitting in the large kites played tunes（曲调）of Chu on flutes.

The making procedure can     7    (divide) into three parts, while the basic one remains     8    same. However, styles of kite-making     9    (various) in different regions. These in the “World Kite Capital” of Weifang in Shandong Province are     10    (good) known for their nice craftsmanship, materials, painting, sculpture and flexible flying movement.