皮皮学，免费搜题
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【单选题】
关于情感性障碍的生化研究结果,目前多数学者认为是A.
去甲肾上腺素的活性升高导致抑郁
B.
多巴胺代谢产物高香草酸升高，导致抑郁
C.
去甲肾上腺素降低导致躁狂发作
D.
5-羟色胺升高导致抑郁发作
E.
5-羟色胺降低导致抑郁发作
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皮皮学刷刷变学霸
举一反三
【单选题】There are __________ primary divisions of Christianity .
A.
three
B.
thirty
C.
thirteen
D.
five
【简答题】Briefly describe the content of primary assessment.
【单选题】The primary function of money is to serve as________
A.
a medium of exchange
B.
a mean of payment
C.
a unit of account
D.
all of the above
【单选题】Which is not secondary primary environmental problem:
A.
Desertification
B.
Optical radiation
C.
Volcano eruption
D.
Soil erosion
相关题目：
【单选题】There are __________ primary divisions of Christianity .
A.
three
B.
thirty
C.
thirteen
D.
five