图1表示北纬50°某地区不同月份母鸡平均产蛋数的波动情况,图2是母鸡繁殖活动的生理调

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问题:

图1表示北纬50°某地区不同月份母鸡平均产蛋数的波动情况,图2是母鸡繁殖活动的生理调节过程示意图(甲、乙、丙表示器官,a、b、c表示相应激素)。请回答下列问题:

已知激素a分子为一种多肽,其受体位于靶细胞的(),这是因为激素a()(填“能”或“不能”)通过具有选择透过性的细胞膜。

考点:高中生物人和高等动物的神经调节人和高等动物的神经调节题库
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下列不属于公司制期货交易所特点的是()。

A.对交易中任何一方的违约行为所产生的损失负责赔偿

B.成本观念强,有利于提高市场效率,加大市场投资建设力度

C.交易所的设立,不是投资行为,不存在投资回报问题

D.以营利为目标,追求交易所利润最大化

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B

Dear Editor,

I’m a Senior 1 student in a middle school. This term, my favourite teacher, Miss Mao, no longer teaches us. I want to see her, but I’m afraid that she no longer likes me and I don’t want to trouble her. I really miss her. What should I do?

Tian Yan  

Dear Tian Yan,

It’s bad luck that you have lost your favourite teacher. But, if she is still in your school, nothing can stop you going to see her. When she isn’t busy, ask her if she minds having a quick chat. You can then tell her she was your favourite teacher. Everyone is happy to know they are liked!

If she has left the school, it will be more difficult to meet her. It will be hard, but remember people always come and go in our lives. We can’t rely on(依靠) them being with us all the time.

You may be sad to say goodbye to her, but we can remember and learn from her. Think of her best qualities.  

You could also try looking for similar qualities in your other teachers. Study hard and give your new teacher a chance. In time, you might start to see that he or she has different qualities to learn from.

Finally, you can not completely rely on other people getting you through your studies, or even your life.

Editor      

35. Tian Yan ______.

A. is a troublemaker     B. likes Miss Mao very much    

C. is happy these days     D. doesn’t like to tell her secret to anyone

36. Which of the following does the editor advise Tian Yan NOT to do?

A. Find a time to see Miss Mao.     B. Have a short chat with Miss Mao.  

C. Tell Miss Mao she likes her.      D. Keep quiet about the thing.

37. The expression “in time” in this passage means “______”.

A. over a period of time    B. on time        C. at the right time      D. a long time ago

38. According to the passage, students can make progress in their studies ______.

A. completely by their favourite teachers     B. completely by their favourite classmates

C. mainly by their parents                 D. mainly by themselves

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下列各物质中的少量杂质,可用括号内的试剂和方法除去的是(  )

A.苯中溶有甲苯(高锰酸钾溶液,过滤)

B.甲烷中含有乙烯(溴水,洗气)

C.溴苯中溶有溴(苯,分液)

D.乙烷中含有乙烯(氢气,加成)

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中国政府在()年()月()日对澳门恢复行驶主权。

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为检查沿燃烧室长向温度分布的合理性,要进行测量的是()。

A、直行温度

B、横排温度

C、全炉温度

D、边火道温度

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