地闪箭式先导平均时间为（）
A.20毫秒；
B.20微秒；
C.2毫秒；
D.40微秒。
参考答案：C
— Be seated, please and I'll make you a cup of tea.
— _________. Let's come to the point first. [ ]
A. You needn't do so
B. Please don't bother
C. You are welcome
D. You are indeed too polite.
新娘化妆要表现新娘（）的女性魅力。
A、端庄温柔
B、活泼可爱
C、时尚前卫
D、轻松休闲
