转向装置一般由()和车把两部分组成。
A.转向器
B.转向盘
C.转向拉杆
D.导向机构
参考答案:D
Unless ________ to answer questions, the pupils won't talk in Mrs Smith's class.
A.asking
B.asked
C.being asked
D.having asked
在Word 2003中,所有的工具栏都可以隐藏。 ( )