可以说立体表面是由()素线构成的。
A.8条
B.12条
C.16条
D.无数条
参考答案:D
—How do you get to school, Sally?
—My home is only one hundred meters from the school, so I usually to school.
A.take the subway
B.go by taxi
C.walk
D.take the train
如果客船的重心位置偏低,那么船舶的()
I、稳性好;
II、稳性差;
III、舒适性好;
IV、舒适性差;
V、方向性差
A、I、IV
B、II、III、V
C、I、IV、V
D、II、IV、V