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【单选题】
以下为必需氨基酸的是A.
半胱氨酸
B.
酪氨酸
C.
丝氨酸
D.
苯丙氨酸
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反馈参考答案：
举一反三
【简答题】a. involving or caus ing sudden great damage or suffering
【单选题】Poor schooling was the root of the unemployment problem
A.
base
B.
result
C.
force
D.
cause
【单选题】Which of the following statements is TRUE according to the passage?
A.
White lies often cause embarrassment in social situations.
B.
It is important for women to have an adequate sense of self-worth.
C.
It takes a little time to get rid of your habit.
D.
Take exercise like running if you are free and keep it up.
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