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【单选题】
Part II Listening Comprehension Section A Directions: In this section, you will hear two long conversations . At the end of each conversation, you will hear four questions. Both the conversation and the questions will be spoken only once. After you hear a question, you must choose the best answer from the four choices marked A, B, C and D. Then mark the corresponding letter on Answer Sheet I with a single line through the centre. Questions 1 to 4 are based on the conversation you have just heard.A.
It tries to predict the possible trends of global climate change.
B.
It studies the impacts of global climate change on people's lives.
C.
It links the science of climate change to economic and policy issues.
D.
It focuses on the efforts countries can make to deal with global warming.
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皮皮学刷刷变学霸
举一反三
【单选题】下列描述中，不属于兴奋-收缩耦联主要步骤的是
A.
肌质网的钙泵对Ca2+的回摄
B.
三联管结构处的信息传递
C.
兴奋通过横管传入细胞深部
D.
ACh 结合并激活终板膜ACh受体阳离子通道
【简答题】PPPOE相比IPOE,只是多了一个获得( )的过程,一旦获得了IP以后,就和静态IP一样了。
【单选题】下列描述中，不属于兴奋-收缩耦联主要步骤的是（ ）
A.
ACh 结合并激活终板膜 ACh 受体阳离子通道
B.
兴奋通过横管传入细胞深部
C.
三联管结构处的信息传递
D.
肌质网的钙泵对 Ca2+ 的回摄