题干

野生燕麦是广泛分布于江苏、河南一带的适应能力极强的麦田杂草.近年来,伴随着大型农业机械跨区作业,被引入山东半岛这个新领地.以下观点最科学的是(    )

A:外来生物就是来自国外的生物,野生燕麦对山东半岛而言不属外来生物

B:外来生物是对生态系统而言的,野生燕麦对山东半岛而言是外来生物

C:野生燕麦进入山东半岛,利于增强当地的生物多样性

D:野生燕麦进入山东半岛,不会威胁当地原有生物种类的生存

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B

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信息匹配

    “As easy as falling off a log” is often used to describe a job that does not take much effort. You might hear a student say to her friend that her spelling test was “as easy as falling off a log”. ____. It is easier to fall off the log than to stay on it.

    ____. One is “easy as pie”. Nothing is easier than eating a piece of sweet, juicy pie unless it is a “piece of cake”.

    “Piece of cake” is another expression that means something is extremely easy to do. A friend might tell you that his new job was a “piece of cake”.

    Another expression is “as easy as shooting fish in a barrel”. It is hard to imagine why anyone would want to shoot fish in a barrel. But, clearly, fish in a barrel would be much easier to shoot than fish in a stream. ____.

    Sometimes, things that come to us easily, also leave us just as easily. In fact, there is an expression —“easy come, easy go”—that recognizes this. ____. Easy come, easy go.

    When life itself is easy, when you have no cares or problems, you are on “Easy Street”. Everyone wants to live on that imaginary street.

    ____. It means to treat a person kindly or gently, especially in a situation where you might be expected to be angry with him. A wife might urge her husband to “go easy on” their son, because the boy did not mean to damage the car.

A. If you ever tried to walk on a fallen tree log, you understand what the expression means.

B. You may win a lot of money in a lottery, then spend it all in a few days.

C. Every people has its own way of saying things, its own special expressions.

D. Another “easy” expression is to “go easy on a person”.

E. There are several other expressions that mean the same thing.

F. And one last expression, one that means do not worry or work too hard.

G. In fact, it would be as easy as “falling off a log”.