搜题请搜索小程序“爱下问搜题”
问题 选择题

4本不同的书放入两个不同的大抽屉中，共有不同的放法为（ ）

A．6种；

B．8种；

C．16种；

D．20种；

答案

答案：C

每本书有两种选择，根据乘法原理，可知不同的放法有种选法.

完形填空

At one point along an open highway，I came to a crossroads with a traffic light. I was alone on the road by now, but _小题1:__ I drove up to the light，it turned red，and I braked to a halt. I looked left, right，and behind me. Nothing，_小题2:__a car，no suggestion of headlights, but there I sat，_小题3:_(wait) the light to change，the only human being for at least a mile in any direction.

I started wondering _小题4:_I refused to run the light. I was not afraid of __小题5:_(catch) by the police, because there was obviously no cop anywhere around and _小题6:certainly would have been no danger in going __小题7:_ it.

Much later that night，the __小题8:_ question of why I’d stopped for that light came back to me. I think I stopped because it’s part of a contract(合同) we all have with each other. It’s not only the law, but it’s an agreement we have，and we trust each other to honor _小题9:__：We don’t go through red lights. Like most of us, I’m more ready to be stopped from doing something bad by the social agreement that disapproves of it __小题10:_ by any law against it.
查看答案
选择题

美国内战是一场 [ ]

A、资产阶级革命

B、无产阶级革命 

C、社会主义革命

D、消灭奴隶制度的革命
查看答案