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【单选题】
有一种毒素在人体内能模拟某种激素的作用。相关研究表明，该激素能与胞内的一种受体结合，并能抑制促激素的释放。根据以上信息，你能得出的合理结论是（）A.
它是一种多肽，可促进生殖
B.
它是一种第二信使，可增加血糖水平
C.
它是一种脂溶性的分子，可降低排卵作用
D.
它属于固醇类，能提高皮质醇的水平
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举一反三
【简答题】栀子生用具有 、 、 等功效;焦栀子具有的功效是 。
【单选题】Of the three sentences in each group, select the one that is NOT a sentence fragment.
A.
Because Manuel was sure he had heard the same strange story many months ago.
B.
Although I will never forget how cold we were when we lost our heat last winter.
C.
Since Anna wasn't at the meeting, I took notes so that she wouldn't miss anything.
【多选题】下列说法正确的是
A.
根据酸碱质子理论，溶剂既能给出质子，又能接受质子，是两性物质
B.
根据酸碱电子理论，提供电对的分子或离子是酸，接受电对的分子或离子是碱
C.
在二元弱酸溶液中，由于第一级解离产生的H+对第二级解离反应产生同离子效应，因此， K a1 Θ > K a2 Θ
D.
25℃时，离子酸NH 4 + 的解离常数 K b Θ (NH 4 + )= K w Θ / K b Θ (NH 3 + )
【简答题】She wouldn't forget her mother's birthday __________ she seldom wrote to her family.
【单选题】Which statement is Not a sentence fragment?
A.
Because Manuel was sure he had heard the same strange story many months ago.
B.
Although I will never forget how cold we were when we lost our heat last winter.
C.
Since Anna wasn't at the meeting, I took notes so that she wouldn't miss anything.
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