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【单选题】
胰岛素受体的结构特点是( )A.
由α、β亚基构成的二聚体
B.
由2个α亚基和2个β亚基构成
C.
α亚基具有酪氨酸蛋白激酶活性
D.
β亚基与胰岛素结合
E.
α亚基是跨膜蛋白
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反馈参考答案：
举一反三
【简答题】甲基麻黄碱的碱性弱于麻黄碱,是因为{1}效应。
【单选题】I didn ’ t hear because there was too much noise where I was sitting.
A.
what did he say
B.
what he said
C.
what was he saying
D.
what to say
【简答题】体心立方晶格的W-S原胞为，以晶格常数为单位其体积为。
【简答题】面心立方晶格的W-S原胞为，以晶格常数为单位其体积为。
【简答题】听短文，根据短文内容填空。 When I was four, I was too nervous to talk to anyone. My classmates often laughed at me. I was sad and could do nothing. Later, something happened and 1_____. my life. My mother aske...
【简答题】I was too t________ to walk any further.
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