【判断题】【消耗次数：1】
生态系统能够保持动态平衡，主要是因为具有自动调节能力。
①
正确
②
错误
参考答案：
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相关题目
【单选题】
要使海洋生物资源可持续利用，就必须保持海洋生态系统的动态平衡。对一个平衡的生态系统来说，下列叙述错误的是（）。
①
A.具有一定的自动调节能力
②
B.具有一定的自动调节能力
③
C.植物与动物的数量相等
④
D.生物成分之间相互制约、相互协调
随机题目
【单选题】
A: [填空]? B: Yes, Id like to open a savings account.
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What do you want to do, sir
②
Why have you come here
③
Do you have anything to do here
④
Can I help you, sir
【单选题】
A: Bill told me he could not come here because his father was ill. B: [填空]
①
Its good.
②
Thats bad.
③
He is impolite.
④
What a pity!
【单选题】
A: Do you know Marks phone number? B: [填空] . A: OK. I might as well look it up in the phone book.
①
Just a second
②
Not that I know of
③
I cant think of it now
④
Why ask?
【单选题】
A: How long can I keep the book? B: [填空].
①
Any period longer than four weeks, you will be fined
②
Four weeks, but you can renew it if you need it longer
③
You can check it on the computer over there
④
At most four weeks if you dont mind
【单选题】
A: Is it time for us to set off now? B: [填空]. We’ll have to wait for one more hour.
①
Certainly, it is
②
Thats all right
③
Sorry, I am afraid not
④
Sorry,its too long
【单选题】
A: We had a trip to China this summer. B: [填空] A: Yes, we did. In fact, we even encountered a lion.
①
Didnt you?
②
How did it go?
③
I guess you did.
④
I bet you had a great time.
【单选题】
A: Can you give me a hand? B: [填空].
①
I can give you both hands
②
Im all yours
③
The pleasure is mine
④
Ill watch your back
【单选题】
A: When does the next train for London leave? B: Theres one leaving at 8 oclock. A: [填空]
①
Are you sure?
②
OK. I dont want to be late.
③
Thanks. Could you wait for me?
④
Id like one ticket, please.
【单选题】
A: Thank you for inviting me to your birthday party. B: [填空].
①
Dont be so polite
②
You are so polite
③
You are quite welcome
④
Dont use thanks
【单选题】
A: You look a little pale. Are you OK? B: [填空], I feel terrible.
①
To tell you the truth
②
To speak out
③
To begin with
④
To sum up