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【单选题】
玉米的高杆（H）对矮杆（h）为显性。现有若干H基因频率不同的玉米群体，在群体足够大且没有其他因素干扰时，每个群体内随机交配子代后获得F1．各F1中基因型频率与H基因频率（p）的关系如图。下列分析错误的是（ ）【图片】A.
0 ＜ p ＜ 1 时，亲代群体都可能只含有纯合体
B.
只有 p=b 时，亲代群体才可能只含有杂合体
C.
p=a 时，显性纯合体在 F 1 中所占的比例为1/9
D.
p=c 时， F 1 自交一代，子代中纯合体比例为5/9
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【单选题】International trade is different from domestic trade, please point out which of the following descriptions is not right.( )
A.
International trade is more costly.
B.
International trade is less costly.
C.
International trade is restricted to trade in goods and service.
D.
International trade is also a branch of economics.
【单选题】Which parable describes the problem of wild animals that are hunted to the point of extinction?
A.
Tragedy of the Commons
B.
Coase theorem
C.
Cost-benefit analysis
D.
Clean Air Act
【简答题】听对话，回答问题 1. What are they going to do next week? A. Have a speech contest. B. Have an English test. C. Have an English speech. 2. Who is more confident? A. Tom. B. We don't know. C. Tina. 3. What's To...
【简答题】情景反应。听问句，选择适当的答语。 1. What are you going to do next week? A. It will be sunny, I think. B. Nothing much, why? C. Let's go to the park. 2. Would you like a mooncake? A. Yes, thank you. B. Certainly. C. ...
【单选题】What are you going to do this weekend?
A.
We are planning to help Xiaoming with his houswork.
B.
I'm afraid not
C.
How about you?
D.
I think so
【简答题】Which of the following stories is not a parable?A. The LostSonB. The LostSheepC. TheDiscord of an AppleD. The GoodSamaritan
【单选题】The author seems to believe that the parable of the fishing net is______.
A.
hard to consent to
B.
incomplete in itself
C.
sound in its analogy
D.
universally applicable
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