题目内容

【题目】How sad! __________ Ethiopian Airlines(埃航) plane crashed shortly after takeoff, killing all on board __________ the morning of March 10, 2019 local time.

A. A; onB. An; onC. A; inD. An; in

【答案】B

【解析】

句意:多伤心啊!当地时间2019310日上午,埃塞俄比亚航空公司的一架飞机在起飞后不久坠毁,机上所有人员全部遇难。考查不定冠词和时间介词。Ethiopian [iθipin]:埃塞俄比亚的,元音音素开头,可知使用冠词an;在具体的某一天或某一天的早上、中午、晚上使用介词on,故“2019310日上午”使用介词on。所以答案是B

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“The answer, is blowing in the wind,” said Michael Meyer. He is the lead scientist for Mars Exploration Program.

It turns out solar winds from the sun are slowly stripping( 除掉) away Mars' air. That is what scientists explained at a press conference.

Bruce Jakosky is the principal investigator on the MAVEN team. It is a spacecraft that collects information from Mars as it circles around the planet.

Today, Mars has a thin atmosphere. It is cold and dry. ______

"When we look at ancient Mars, we see a different type of surface. One that had valleys that looked like they were carved by water, lakes that were standing for a long period of time. We see an environment that was much more able to support liquid water."

Recently scientists found a kind of liquid water that flows with salt down a mountain area of the planet. But, it is not always there. Scientists already knew that ice exists on Mars. So why is it important to find liquid water?

"It means that we have a resource. And when we're looking at sending humans to Mars, water is one of the key things that we need to have. Not only for the astronauts to drink, but also to make oxygen and fuel."

Sending humans to Mars will be in the 2030s. Those chosen might fly any number of space vehicles still in development.

Human beings are developing rockets and spacecraft to get people to Mars. Scientists want to know how the human body reacts to being in space for long period of time.

Whether there is life on Mars remains unanswered. But some scientists think there might be some kind of microbial life on the planet. Finding life on another planet would change the way we view the whole universe.

1What was the surface of ancient Mars like?

A. It had thin air.B. It was dry.

C. It had valleys that looked like they were carved by water.D. It had no water.

2Which statement is TRUE according to the passage?

A. The surface of the Mars is different from it used to be.

B. Scientists have known whether there is life on Mars.

C. People can not send humans to Mars forever.

D. There is not any atmosphere on Mars.

3What does the underlined word "Those" in the text refer to?

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【题目】根据短文内容,把所缺单词的正确形式完整地填写在短文后面相应的横线上,使句意完整。

so we teach different eye show complete understand bright who

so we teach different eye show complete understand bright who

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