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【单选题】
下列有关“一枝黄花”的叙述中正确的是()。
A.
“ 一枝黄花”属于外来物种,进入我国后可以增加我国生物多样性
B.
“ 一枝黄花”的成灾最可能的原因是本地缺乏其天敌
C.
为控制“一枝黄花”可以再从原产地引进其天敌
D.
观赏植物“一枝黄花”进入我国后的种群增长曲线为S型曲线
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【简答题】如图所示为某种群在不同生态系统中的增长曲线模式图,请据图回答下列问题: (1) 如果种群生活在一个理想的环境中,种群数量是按 a 曲线增长,但实际上,在自然环境中 和 都是有限的。若按 a 曲线方式增长其增长率 。(增大或减少或不变) (2) 在一定环境中,除上述影响外,种群数量还受其他环境因素的限制。如无机环境方面主要是 的影响。种群数量增长按 b 曲线方式增长,最多达到 K 值时,此时种群增长...
【单选题】Despite such a big different in the _____ towards what one eats, there is no doubt that people in the west regard Chinese food as something special. [     ]
A.
point
B.
idea
C.
attitude
D.
sight
【单选题】He says ______ he will go skating tomorrow.
A.
what
B.
that
C.
if
D.
how
【单选题】He’s amazingly cheerful considering all he’s had to __________.
A.
go through
B.
get through
C.
get in
D.
go in
【单选题】Woman: Grey says he's going to take three extra classes.Man: He's got to be kidding.Question: What does the man mean?
A.
He thinks Grey is too young.
B.
He thinks it's a good decision.
C.
He's surprised.
D.
He is angry.
【简答题】Despite their different approaches, the two talk shows are both ________. A) ironical B) sensitive C) instructive D) cynical
【单选题】动机对于活动的影响和作用有不同的方面,由此可对动机进行不同的分类,根据动机在活动中所起的作用不同,可将动机分为主导性动机与()。
A.
.近景动机
B.
远景动机
C.
社会性动机
D.
辅助性动机
【单选题】What's the man's plan for this vacation?
A.
He wants to go to China.
B.
He wants to go to Australia.
C.
He wants to stay home.
【简答题】—Tom says he is too tired to go on. —He can’t be.He ____for an hour. A.just worked B.has only been working C.has just worked D.had only been working
【单选题】Despite the fact that the two council members belonged to different political parties. They ______ the issue of how to finance the town debt.
A.
complicated
B.
agreed on
C.
avoided
D.
reported on
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