发动机能把（）实现动力输出。
A.热能转换为机械能
B.热能转换为电能
C.电能转换为机械能
D.机械能转换为热能
参考答案：A
根据句意，在答题卷标有题号的横线上，写出括号内所给单词的适当形式。
小题1:The shoes are very nice. I want to buy ___________ (they).
小题2:The new iPhone 5S must be someone ___________ (else). It isn’t hers.
小题3:Which lesson do you like ___________ (well), Chinese, English or Maths?
小题4:We can keep __________ (diary) every day. It’s interesting.
小题5:On the ___________ (one) day, he does some homework.
总线结构适用于广域网。
