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【单选题】
维生素C缺乏影响_____。A.
辅酶I、辅酶 II的合成
B.
羟脯氨酸、羟赖氨酸的合成
C.
嘌呤、嘧啶的合成
D.
红细胞谷胱甘肽还原酶活性
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皮皮学刷刷变学霸
举一反三
【单选题】When the economy is in recession, jobs are generally harder to find and more people go to college. We can conclude that the opportunity cost of
A.
going to college decreases when the economy is in recession.
B.
going to college increases when the economy is in recession.
C.
working increases when the economy is in recession.
D.
working is zero when the economy is in recession.
【简答题】骨盆是由 、 及 所组成
【单选题】amici vecchi
A.
amici anziani
B.
amici da tanto tempo
C.
uomo molto famoso e importante
D.
uomo molto alto
【单选题】vecchi amici
A.
amici anziani
B.
amici da tanto tempo
C.
uomo molto famoso e importante
D.
uomo molto alto
【简答题】A．NRZ B．AMI C．曼彻斯特 D．4B/5B
【单选题】When the national economy is faced with a recession or high inflation, the government engages in active policies with timely attempts to move the economy back ______.
A.
with the right track
B.
on the right track
C.
for the right track
D.
in the left track
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