Have scientists found of water on Mars?
举一反三
- 科学家们此前已经在月球上发现了冰存在的迹象，也在月球稀薄的大气中发现了水蒸气存在的迹象。 A: Scientists have previously found pieces of ice on the Moon and water drops in its thin atmosphere. B: Scientists have found slices of ice on the Moon and water in its thin atmosphere. C: Scientists have previously confirmed the evidence of ice on the Moon and water in its thin atmosphere. D: Scientists have previously found signs of ice on the Moon and water vapor in its thin atmosphere.
- Some scientists think there may have been life on the Mars in the past because （） A: there is no life there now B: there is a large amount of water at the poles C: the Mars may be able to support life in the future D: conditions may have been similar to those on the Earth
- ______scientists have found a way to significantly slow down the ______ by______their______.
- As can be probably perceived, a manned trip to Mars may soon ________ since scientists have achieved the manned moon mission.
- The Japanese scientists have found that scents ________ efficiency and reduce stress among office workers.