各级公路都必须保证的视距是（）。
A.超车视距
B.停车视距
C.错车视距
D.会车视距
参考答案：B
在新员工对企业及员工不熟悉的情况下，( )是新员工获取企业信息的基本来源。
A．企业简介 D．企业宣讲 C．员工手册 D．电视广告
—Jack, this is the third time that you have been late this week.
—Sorry, sir, but I was _____ for 15 minutes on the way.
A．held up
B．put up
C．taken up
D．given up
