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【单选题】
蛋白质的主要作用不包括?( ) [单选题] *A.
供能
B.
増强肌肉力量
C.
提供益生元
D.
提供必需氨基酸
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【简答题】What will you do during your summer v___________?
【简答题】No one goes to the school during the v______.
【简答题】A．The library closes earlier during the summer. B．The library is closed during summer vacation. C．The library will be open until midnight tonight. D．She does not usually go to the library during the s...
【简答题】两个空气介质平行板电容器C1和C2,若两极板正对面积之比为3:2,两极板间距离之比为3:1,则它们的电容量之比为 。若C1为6μF,则C2 = μF
【单选题】------ How was your trip to Yungang Caves during your National Day holiday? -------- Wonderfully! I’ve never had _______ one before．
A.
a pleasant
B.
a more pleasant
C.
a most pleasant
D.
the most pleasant
【简答题】两个电容器C1=6μF,C2=3μF,若将这两个电容器串联,则总电容为_____________μF;若将这两个电容并联则总电容为_____________μF。
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