问题 单项选择题

基于以下题干:
Ⅰ.所有并且只有带轮子在高速公路上运行的交通工具是交通污染源。
Ⅱ.自行车不是交通污染源。
Ⅲ.我在高速公路上驾驶自己的汽车的时候,天都下着雨。
Ⅳ.现在天正下着雨。

如果上述断定都是真的,下面哪项断定也一定是真的

A.自行车并不在高速公路上行驶。

B.只有当天下雨的时候,自行车才在高速公路上行驶。

C.如果我的汽车不在制造污染,则天没有下雨。

D.我现在正在高速公路上驾车。

答案

参考答案:A

解析:在Ⅰ“所有并且只有带轮子在高速公路上运行的交通工具是交通污染源”中,“所有并且只有”表达的是充分必要条件。依据这一条件关系,我们可以得出“不是交通污染源的或者不带轮子或者不在高速公路上运行”,加上条件Ⅱ“自行车不是交通污染源”,可知“自行车或者不带轮子或者不在高速公路上行驶”:而很明显,自行车是带轮子的交通工具,由此可以推出“自行车并不在高速公路上行驶”。

阅读理解

第四部分:阅读理解(20小题;每小题2分,满分40分)

阅读下列短文,从每题所给的四个选项(A、B、C和D)中,选出最佳选项,并在答题纸上将该项标号涂黑。

A

TV Shows and Long Bus Trips

Long bus rides are like television shows. They have a beginning, a middle, and an end-with commercials thrown in every three or four minutes. The commercials are unavoidable. They happen whether you want them or not. Every couple of minutes a billboard glides by outside the bus window. “Buy Super Clean Toothpaste.” “Drink Good’n Wet Root Beer.” “Fill up with Pacific Gas.” Only if you sleep, which is equal to turning the television set off, are you spared the unending cry of “You Need It! Buy It Now!”

The beginning of the ride is comfortable and somewhat exciting, even if you’ve traveled that way before. Usually some things have changed-new houses, new buildings, sometimes even a new road. The bus driver has a style of driving and it’s fun to try to figure it out the first hour or so. If the driver is particularly reckless(不计后果的) or daring, the ride can be as thrilling as a suspense story. Will the driver pass the truck in time? Will the driver move into the right or the left-hand lane? After a while, of course, the excitement dies down. Sleeping for a while helps pass the middle hours of the ride. Food always makes bus rides more interesting. But you’ve got to be careful of what kind of food you eat. Too much salty food can make you very thirsty between stops.

The end of the ride is somewhat like the beginning. You know it will soon be over and there’s a kind of expectation and excitement in that. The seat, of course, has become harder as the hours have passed. By now you’ve sat with you legs crossed, with your hands in your lap, with your hands on the am rests---even with your hands crossed behind your head. The end comes just at the right time. There are just no more ways to sit.

61. According to the passage, what do the passengers usually see when they are on a long bus trip?

A.buses on the road.    B.films on television.

C.advertisements on the board.   D.gas stations.

62.What is the purpose of this passage?

A.To give the writer’s opinion about long bus trips.

B.To persuade you to take a long bus trip.

C.To explain how bus trips and television shows differ.

D.To describe the billboards along the road.

63.The writer feels long bus rides are like TV shows because                     .

A.the commercials both on TV shows and on billboards along the road are fun

B.they both have a beginning, a middle, and an end, with commercials in between

C.the drivers are always reckless on TV shows just as they are on buses

D.both traveling and watching TV are not exciting

64.Why does the writer think that the end of the ride is somewhat like the beginning?

A.Because both are exciting.       B.Because both are comfortable.

C.Because both are tiring.    D.Because both are boring.

填空题