下面关于生态系统的叙述中，错误的是_刷题宝

题干

下面关于生态系统的叙述中，错误的是（）

A：大多数动物在生态系统中充当消费者

B：一个鱼塘中的所有生物构成了一个生态系统

C：生物圈是地球上最大的生态系统

D：生态系统具有一定的自我调节能力

上一题下一题 0.0难度选择题更新时间:2018-02-11 06:03:06

答案(点此获取答案解析）

B

同类题1

____

同类题2

识读下列图文材料:

材料一

图1 把经济危机比喻为大章鱼

图2 经济危机中的德国

材料二 1930年5月,美国国会通过对890种进口商品提高征税的法案。到1931年年底,有25个国家采取报复措施,到1932年4月更增加到76国以上。1932年,英国在渥太华举行英联邦会议,决定在英帝国内部建立关税优惠制;法国则采取限额输入的办法,保护本国的商品市场。这就形成激烈的关税战、市场战、货币战。——吴于廑、齐世荣主编《世界史·现代史编》上卷

请完成:

同类题3

阅读下面材料,从每题所给的三个选项(A、 B和C)中,选出最佳选项,

Let's read the conversations and guess the meaning of the following expressions.

It's up to you.

A: What would you like for dinner tonight?

B: I'm not sure. What do you want?

A: It's up to you. Whatever you want, we will have.

In your dreams!

A: Guess what? This weekend, I caught a fish this big.

B: No way.

A: Yeah, it was huge!

B: In your dreams! It's impossible that you caught a fish that big.

Play it by ear.

A: Hey, what do you want to do this weekend?

B: I don't know. Maybe we can go to see a movie or have dinner. Why don't we play it by ear?

A: Sure. Let's decide as we go along.

Keep my fingers crossed.

A; Hey, How are you?

B: Hey, I am doing great. I did well in a job interview yesterday. I really hope to get the job.

A: Oh, have you heard back from them?

B: No, not yet. But I'm keeping my fingers crossed. Hopefully they'll ca11 me today.

Miss the point

A: Okay. So now do you understand?

B: I'm not sure. Can you explain it again? I think I missed the point.

A:. All right. I'll explain it one more time.

同类题4

Mrs Zhang always asks us to _________ conversations in the English classes.

同类题5

人和类人猿的共同祖先是（　　）

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