梅森没有和简爱说话，因为（）。 A.他晕了 B.他害怕惊醒杀人犯 C.他没力气说话

阅读短文，选择正确答案

Many people love going on a trip by plane，but an airport is usually far from the city．You have to arrive there and wait for hours for the plane to take off and it is often late．You can’t open the window，you can’t choose the food．Planes are fast，but it takes hours to get out of the airport and into the city．

I like travelling by train．I think trains are safe．Train stations are usually in cities．When you are late for a train，you can catch another one．You can walk around in the train and open the windows．You can see many interesting things on your way．I know it takes a little sore time．

I also like cars．You can start your trip when you want to，and you don’t need to get to a station bus stop．You can carry many things with you，too，but sometimes there are many cars on the road．

小题1:Many people like travelling by plane because ________．

A．it is safe                                                B．you can open the window

C．it is fast

小题2:What does “take off’’ mean？

A．达到                  B．起飞                  C．降落

小题3:If you want to take many firings with you，you would like to take ________．

A．a bus                  B．a train                C．a car

小题4:What is not good about the car？

A．You needn’t go to the station．

B．You can start your trip when you want to．

C．There are too many cars on the road．

小题5:Which sentence about the writer is TRUE？

A．He likes taking a plane because it takes a lot of time to go to the city．

B．He likes taking a train because it is safe and convenient．

C．He likes taking a bus because he can drive it．

如图所示，用杠杆提升重物，设作用在A端的F始终与杠杆垂直，则要将重物提到最高处的过程中，F的大小将（）。

A．逐渐变小

B．保持不变

C．逐渐变大

D．先变大，后变小

自然选择学说能科学地解释生物界中物种的（）。

A.进化原因

B.多样性

C.遗传性

D.适应性

E.变异性

下列不属于客运调度工作职责的是（）。

A.对全线客运组织进行有效监控，跟踪车站客流情况，发现异常时，立即向值班主任报告，并采取有效的措施，及时疏导客流

B.及时与票务中心调度联系，收集全线各站的客流数据等客流信息，汇总后向值班主任报告

C.设备故障、突发事件等情况时，协助值班主任处理事件，进行短信发送，向相关车站发布列车晚点信息，需要时向有关领导电话汇报，并做好记录，确保信息及时畅通。

D.对行车设备进行监控、操作、管理

水龙头为什么会出现水流小的现象？