29． When it thunders, we always see the light before we hear the sound．______ It’s becauseA． our eyes are in front of our earsB． our eyes are cleverer than our earsC． our eyes can see but our ears can-tD．light goes faster than sound

题目

29． When it thunders, we always see the light before we hear the sound．______ It’s because

A． our eyes are in front of our ears

B． our eyes are cleverer than our ears

C． our eyes can see but our ears can-t

D．light goes faster than sound

相似考题

1.我们从特供商场购买食品，并加强对所购食品的检查A.We’ll buy all the food from supermarket and check all the food we buy carefullyB.We’ll buy all the food from foreign countries and check all the food we buy carefullyC.We’ll import all the food and check all the food we buy carefullyD.We’ll buy all the food from exclusive shops and check all the food we buy carefully

2.The problem is so serious that the situation is out of control.A.We’ve got to set up a police line and ask for aidB.We’ve got to ask for back-up from the PLA and policeC.We’ve got to report to the superiors rapidly and ask for back-upD.We have informed the authorities to take precautionary measures.

3.How many armored vehicles does your company dispatch for this job?A.We’ll dispatch several armored vehicles and escort securities for this jobB.The company has made a plan to send many vehicles and escort securities for this jobC.Two armored vehicles and experienced escort securities will be dispatched for this jobD.We’ll dispatch not only vehicles but also experienced securities for this job

4.Any open flame can’t exist in this business buildingA.Yes. We’ve removed all the flammable gas.B.Yes. We’ve searched everywhere for flammable liquidC.Yes. All the flammable liquid and gas have been removed already.D.Yes. We’ve removed all the liquid, gas and wood which can be burned

参考答案和解析
正确答案：D
29.D【解析】这是一个科普常识，因为光速比声速快。
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