为防止航行途中锚链因锚的自重而被拉下海，锚设备中应设有（）
A.锚机
B.锚链轮
C.止链器
D.锚链筒
参考答案：C
You ______ to the meeting this afternoon if you have something important to do.
A．needn’t to come
B．don’t need come
C．don’t need coming
D．needn’t come
During the last few years, it has been realized that maintenance of programs is more expensive than development, so reading of programs by humans is as important as (67) them.
A．editing
B．writed
C．written
D．writing
