, accusing the show’s organizers of fly-by-night behavior. The staff of Hidden Singer later apologized to Xue. Fly-by-night 指“不可靠的，无信用的”，尤其商业活动中的。守信用的人可以说a man of his word，不守信用break/go back on one ……

(fed, fed)。feed sth to 给……喂……。Bats fly at night and feed on insects.考点看台As a big country and home ……

, the solar cells also recharge (充电) lithium batteries (锂电池), which make the aircraft fly at night...瑞士太阳能飞机开启环球之旅。HOW do planes fly? Most planes fly by oil. But Solar Impulse 2 (阳光动力2号) is different ……

power to electricity and make the plane fly. Meanwhile, the solar cells also recharge (充电) lithium (锂电池) batteries, which make the aircraft fly at night.“It is not the first solar airplane, however ……

. They sleep upside down (倒挂地). They can sleep for about 19 to 20 hours under a leaf! They wake up and fly in the night. Walruses 睡觉游泳两不误Walruses (海象) can sleep and swim at the same time. They can hold ……

. Solar Impulse. D. Birds.2. Which of the following is TRUE of Solar Impulse?A. It can only fly at night.B. It has already flown across the US.C. It is powered by the sun.D. It needs gas to work.3 ……

is TRUE of Solar Impulse 2?A. It can’t fly at night.B. It is the first solar airplane in the world.C... his 7 unfinished. He completed his work late at night. He was very 8 . He went home, had a good meal ……

(吸收) power from the sun. They absorb so much power that the plane can still fly even at night....A. cannot fly at night B. is powered by chemicalsC. is driven by solar energy D. was made in the US 2 ……