问题 单项选择题

由于近期的干旱和高温,导致海湾盐度增加,引起了许多鱼的死亡,虾虽然可以适应高盐度,但盐度高也给养虾场带来了不幸。 以下哪个选项为真,就能够提供解释以上现象的原因( )

A.持续的干旱会使海湾的水位下降,这已经引起了有关机构的注意

B.幼虾吃的有机物在盐度高的环境下几乎难以存活

C.一些鱼会游到低盐度的海域去,来逃脱死亡的厄运

D.水温升高会使虾更快地繁殖

答案

参考答案:B

解析: 需要解释的现象是为何虾能够适应高盐度,养虾场依然会因为盐度升高而遭遇不幸,所以最恰当的原因就是B项,正因为如此,虾缺乏食物,所以虾仍然难以生存。故选B。

阅读理解

请阅读下面短文,根据短文内容从每小题所给的A、B、C、D四个选项中选出最佳选项

     When I crossed a small road on my first day in Kolkata, I was surprised because I heard a bell-not a horn (喇叭),  It was a tiny man pulling a rickshaw, He stopped and picked up two children from the front door of their house and pulled them to school. For many people, the rickshaw in Kolkata has many advantages, When the traffic is bad, rickshaws find a way through the traffic. If your miss your bus and there aren't any taxis, you can always find a rickshaw in Kolkata. Rickshaws are from your house to the market and waits for you. Then he loads (装载)all your things, drops you off outside your home and helps you unload, No other type of public transport offers this kind of service. 

   From June to September, Kolkata gets heavy rain. Sometimes it rains for 48 hours without a break. In some parts of the city, the roads flood (水淹), and anything with an engine(发动机) is useless, But the rickshaw drivers never stop working, even with water all around them.

    But not everyone thinks rickshaws are a good thing. The local government want to ban rickshaws. They believe it is wrong for one man to pull another person when there is modern transport in the city. However, there is a problem with this plan. Many of the rickshaw drivers come from the countryside. The only job they can find in Kolkata is pulling a rickshaw, If the city bans rickshaws, these men won't have a job. So for the moment, the people of Kolkata still go by rickshaw.

    1. What is the main idea of Paragraph 1?

    A. The rickshaw drivers carry things for local people in Kolkata. 

    B. Parents need rickshaws for taking children to school in Kolkata.

    C. Rickshaws can find a way through the bad traffic in Kolkata.

    D. Rickshaws are very useful for the people' s daily life in Kolkata.

    2. What does the underlined word "ban" mean?

    A. make       B. increase     C. forbid      D. collect

    3. What can we learn from the passage?

    A. The rickshaws in Kolkata have loud horns.

    B. The rickshaw is still a part of public transport in Kolkata.

    C. The local government offer many other jobs to the rickshaw driven.

    D. The people in Kolkata are supposed to take rickshaws instead of cars.

不定项选择