“Isthere life out there?” is a question which scientists are trying to answer. T-组卷网

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“Is there life out there?” is a question which scientists are trying to answer. They look for life in space. In recent years, they have turned their attention to Europa, the sixth closest moon of Jupiter (木星).

Europa is a little smaller than the moon and is covered by ice. Its surface is too cold for anything to live there. Scientists want to know what lies under the ice, for that is where any life on Europa would most likely be.

For years, scientists believed all life on the earth depended on the sun. The discovery of chemosynthetic (化学合成的) life has changed scientists’ idea—planets with oceans (海洋) and hydrothermal vents (热液喷口) might also support life.

Europa does have oceans. In fact, Europa appears to have more oceans than the earth does. The ice on this moon’s surface covers what appears to be moving water. Do these oceans have hydrothermal vents? Scientists do not know yet. If they do, the oceans of Europa might support life. Only a space travel to Europa would tell for certain.

Scientists are studying the closest possible environment they can find on the earth: Lake Vostok. Like Europa’s oceans, Lake Vostok is miles under a frozen surface. It does not receive direct sunlight, either.

So like Europa, the lake cannot support photosynthetic (光合作用的) life. If scientists find life in the lake, it would support the idea that there might also be life on Europa.

根据短文内容选择最佳答案。
【小题1】The underlined word “likely” in the passage probably means ________ in Chinese.

A．喜爱的

B．可能的

C．绝对的

【小题2】Which of the following is NOT true according to the passage?

A．Nothing can live on the surface of Europa.

B．Life may be found on planets with oceans and hydrothermal vents (热液喷口).

C．Scientists want to study Europa because it is the closest moon of Jupiter.

【小题3】What does the underlined word “they” in Paragraph 4 refer to (指代) in the passage?

A．Scientists.

B．Space travels.

C．The oceans of Europa.