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问题 选择题

已知某两种物质在一定条件下能发生化学反应，其反应的微观示意图如下：

则下列说法中，正确的[ ]

A．图中的反应物都是化合物

B．该反应属于复分解反应

C．该反应属于置换反应

D．该反应不符合质量守恒定律

答案

答案：C

完形填空

Is there a chocolate-powered racing car in the world? Hey! You have read too (A)________ children’s books! But wait! Now，there is really such a racing car in the world．A team from a British university made it．

The chocolate-powered racing car’s engine(发动机) uses waste from chocolate factories or vegetable oil as fuel (燃料)．Its body (B)用土豆制成，its steering wheel is made from carrots，its seat is made of soybeans，(C)________its brake pads(刹车片)are made from nuts! Well，can this car run very fast? (D) Certainly! It can go from zero to 60 miles per hour in 2.5 seconds，and go as fast as 135 miles per hour．When the racing car is running，it cleans itself and lets out oxygen．

“It took us more than nine months to (E) complete the racing car，”said a team member．“The car is really green． You can find many of the car’s parts at a farmer’s market or even in a litter bin because most of the materials(材料) are waste in most people’s eyes．It’s fun．”

However，(F)this eco-friendly  (环保的) car cannot be driven in the official(正式的)race because of the engine’s unusual fue.

小题1:在文中(A)和(C)的空白处分别填入适当的词 ________ ________

小题2:将文中划线部分(B)译成英语：________

小题3:写出文中划线部分(D)和(E)的同义词语或近义词语：________ ________

小题4:将文中划线部分(F)改写为：the engine’s unusual fuel makes it________ to________ this eco-friendly car in the official race

小题5:从文中找出能说明本文中心大意的短语：________
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解答题

科技园上午有游客910人，中午有247人离去．下午有来了453位游客，这时园内有多少游客？全天园内来了多少游客？
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