热机是将内能转化成 ___能的机器；热机一个工作循环由______个冲程组成，其中如图所示是热机的__________冲程
The simple joy of reading is something we take for granted. But many people have had to _____ this pleasure because of poor eyesight. A. give in B. give off C. give out D. gi
Not only ______interested in football but ______beginning to show an interest in it. A. the teacher himself is … all his students areB. the teacher himself is …are all his students C. is the
下列各项中翻译不恰当的一项是：（ ） Ａ．外无期功强近之亲，内无应门五尺之童；茕茕独立，形影相吊。 在外面没有建功立业的亲戚，在家里又没
大熊猫的学名是 Ailuropoda melanoleuca，其中 Ailuropoda 和 melanoleuca 分别表示A.种名、属名 B.属名、种名 C.种名
