【判断题】【消耗次数：1】
目前许多自然生态系统已被开发利用成为人工生态系统，其中对其它生态系统的依赖很大，比较脆弱的人工生态系统是果园生态系统。
①
正确
②
错误
参考答案：
复制
纠错
相关题目
【单选题】
森林生态系统对太阳能的利用率远大于农田生态系统，主要原因是森林生态系统（）。
①
A.以木本植物为主
②
B.土壤肥沃
③
C.没有人类的活动
④
D.植物群落有分层结构
随机题目
【单选题】
People at the party worried about him, because no one was aware ______ he had gone.
①
of where
②
of the place where
③
where
④
the place
【单选题】
If you drink too much, your health will get even ____.
①
bad
②
poor
③
worse
④
not well
【单选题】
I haven’t seen her for years, but I could still ____ her voice on the phone.
①
recognize
②
realize
③
hear
④
know
【单选题】
As I knew him better, I discovered that my____ had been right.
①
enjoyment
②
improvement
③
impression
④
environment
【单选题】
His explanation is not at all clear. I find it ____.
①
essential
②
confusing
③
awful
④
puzzled
【单选题】
Things never went _____ as we had expected
①
so smoothly
②
smooth
③
so smooth
④
smoothly
【单选题】
Everyone of them _______ tired and wanted a good rest.
①
seems
②
is seemed
③
was seemed
④
seemed
【单选题】
Peter: How about going to the movies tonight then?Mary: ____
①
I don’t know.
②
The movie is very interesting.
③
That sounds good.
④
The movie is very boring.
【单选题】
John was going to _______ Mary by telling his friends how much weight she had gained.
①
essential
②
embarrass
③
elementary
④
consider