题干
.
16. As we all know, Asia is _____Europe.
16. As we all know, Asia is _____Europe.
A：four times as the size of
B：four times the size a
C：four times the size of
D：the size four times a
答案(点此获取答案解析）
C
的周期为30小时18分，则两颗卫星相比 （ ）