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【单选题】
Mother is preparing a meal while keeping () the baby.A.
eyes on
B.
eye on
C.
an eye for
D.
an eye on
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【单选题】-________ do you want some money? -Because I want to buy some fireworks. [ ]
A.
Why
B.
When
C.
What
D.
How
【单选题】---What do you want to do for those children in the countryside? --- I want to ____ some money for them.
A.
raise
B.
pay
C.
give
D.
spend
【单选题】图示电路中， 正确的电压方程是（ ）。【图片】
A.
U S1 - R 1 I 1 + R 3 I S =0
B.
U S2 - R 2 I 2 + R 3 I S =0
C.
U S1 - R 1 I 1 - U S2 - R 2 I 2 =0
D.
U S1 + R 1 I 1 - U S2 + R 2 I 2 =0
【单选题】如图 1-26 所示电路中正确的电压方程是 ( )
A.
U = Us - RI
B.
U = Us + RI
C.
U = -Us - RI
D.
U = -Us + RI
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【简答题】我国宪法确立的国体和根本政治制度是什么?
【简答题】生物体内能量的储存、转移和利用都以( )为中心进行。
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