The reason why women and blacks play down their visibility is that they ______.

A:know that someone in authority will reach down and give them a promotion B:don't want people to think that their promotions were due to sex or color C:don't want to give people the impression that they work under false beliefs D:believe they can get promoted by reason of their sex or color

The reason (why) I came late (for) the meeting was (because) my car (broke down).（　）

A:why B:for C:because D:broke down

The store had to （　） a number of clerks because sales were down.

A:lay out B:lay off C:lay aside D:lay down

The store had to ______ a number of clerks because sales were down.

A:lay out B:lay off C:lay aside D:lay down

The end of the bidding is called" knocking down" because ______. ( )

A:the auctioneer knocks the buyer down B:the auctioneer knocks the rostrum down C:the goods are knocked down on to the table D:the auctioneer bangs the table with a hammer

The word "chop down" in the second paragraph means ______.

A:clear B:make rooms for C:destroy D:cut down

命令Backup state—down 3表示______。

A:第三种备份down状态 B:主备份接口切换只能进行3次 C:当主接口down状态持续3秒后，切换到备份接口 D:当主接口逻辑通道时，如果呼叫3次未成功，则认为主逻辑通道处于down状态

命令Backup state-down3表示______。

A:第三种备份down状态 B:主备份接口切换只能进行3次 C:当主接口down状态持续3秒后，切换到备份接口 D:当主接口逻辑通道时，如果呼叫3次未成功，则认为主逻辑通道处于down状态