一般来说，柴油机的指示热效率高于汽油机，四冲程发动机的指示热效率高于二冲程发动机。
参考答案：对
We should consider the students’ request ___the school library provide more books on popular science.
A．that
B．when
C．which
D．where
—Kangkang, is this bike _______?
—Yes, I like ______ very much. [ ]
A. you, its
B. yours, it
C. your, him
