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【单选题】
当氢质子放入静磁场后,下列情况正确的是A.
氢质子磁矢量都平行主磁场且方向相同
B.
氢质子磁矢量都平行主磁场且方向相反
C.
氢质子磁矢量都平行主磁场且低能级质子与主磁场方向相同
D.
氢质子磁矢量都主磁场且能级质子与主磁场方向相同
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【简答题】阅读理解。 A young woman carrying a three-year-old child got on a bus. The conductor hurried to give her a warm welcome and then kindly asked the other passengers to make more room for the woman and her ch...
【单选题】Heart rate of 2-year-old child is
A.
60~70 times per minute
B.
80~90 times per minute
C.
100~ 120 times per minute
D.
130~140 times per minute
E.
150~160 times per minute
【单选题】The young man was ___ for giving his life to rescuing a five-year-old child.
A.
cited
B.
mentioned
C.
listed
D.
quoted
【单选题】The 6-year-old child is old enough_______ himself.
A.
to dress
B.
to wear
C.
dresses
D.
wears
【单选题】Which number would you use to order a book for a 2-year-old child?
A.
0 7459 3892 2．
B.
0 7459 4056 0．
C.
0 7459 3952 X．
D.
0 7459 4578 3．
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