通常毛圈的数量多而且长,毛巾的柔软性和吸水性就好,但如果毛圈太长就容易被钩坏,故一般要求毛圈的长度在()毫米左右即可。
A.1
B.3
C.5
D.7
参考答案:B
Samuel survived when the car ______ he was a passenger in turned off the road and hit a tree. [ ]
A. where
B. that
C. as
D. why
请简要描述一下未来空袭战争的特点?