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【单选题】
关于人绒毛膜促性腺激素(hCG)正确的是A.
由绒毛细胞滋养细胞分泌
B.
受精卵形成后滋养细胞即开始分泌hCG，是诊断早孕的最敏感方法
C.
有与生成激素相似的β亚基
D.
为不含糖分子多肽激素
E.
参与母胎界面的免疫调节机制，以免胚胎滋养层被母体淋巴细胞攻击
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参考解析：
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皮皮学刷刷变学霸
举一反三
【单选题】—What did John say about leaving the city? —He said he disliked the place so he had no _____ about leaving so soon.
A.
hopes
B.
regrets
C.
memories
D.
comments
【简答题】P196:3(1)-(4)
【简答题】P196 : 4 ( 1 )( 8 )
【简答题】A．He is optimistic about the next year's market. B．He is worried about the increase in food prices. C．He is not sure about the petrol prices. D．He is pleasant for the decrease in unemployment.
【简答题】辅音和声母的区别是什么?
【简答题】P196 4 (1)(3)
【简答题】A．He went for a tour of the city. B．He read about it. C．He wrote an article about it. D．He worked there as a guide.
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