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【单选题】
下列各组原子核的核磁矩为零,不产生核磁共振信号的是( )。A.
1 H 、 14 N
B.
19 F 、 12 C
C.
12 C 、 1 H
D.
12 C 、 16 O
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举一反三
【单选题】Helping others on their homework also helps you ______ your knowledge.
A.
boost
B.
solidify
C.
involve
D.
detriment
【单选题】–Putting on a happy face not only helps to make friends, but also makes us feel better. –_______________.
A.
I’d love to
B.
I’m with you on that
C.
It’s up to you
D.
It’s my pleasure
【简答题】Recent findings also indicate that ______ helps us keep memory at its height.
【简答题】It also helps you turn pages and change your choice of (views/viewing) _________.
【单选题】---- Putting on a happy face not only helps us make friends but also makes us feel better. ----( ).
A.
I’d love to
B.
I’m with you on that
C.
It’s up to you
D.
It’s my pleasure
【单选题】----Putting on a happy face not only helps to make friends, but also makes us feel better. ----_________________.
A.
I’d love to
B.
It’s up to you
C.
I’m with you on that
D.
It’s my pleasure
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