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【单选题】
Which of the following is TRUE as to the results of the research?A.
Increased serotonin weakens sensitivity to the tastes of bitter and sour.
B.
The more anxious people are, the more sensitive to sour taste.
C.
The tryptophan can add healthy people's serotonin amount.
D.
The tryptophan can lower healthy people's serotonin level.
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反馈参考答案：
举一反三
【简答题】对流换热主要发生在( )、炉的( )、流动粒子炉中的( )与( )之间及( )与( )之间。
【单选题】Please choose the thesis statement that is a clear, limited point.
A.
I want to discuss what it means to be a good citizen.
B.
Deciding who will perform certain unpleasant household chores can be the cr that makes or breaks a marriage.
C.
My thesis in this paper is relationships between stepparents and stepchildren.
D.
This paper explains how to purchase a good used car.
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