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【简答题】
晶体的布拉伐格子共有( )种
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【单选题】Thecostoftheairfareishigherthan________.A.the rail fareB.that of the rail fare###
A.
The cost of the air fare is higher than________. A.the rail fare
B.
that of the rail fare
C.
those of the rail fare
D.
which of the rail fare
【单选题】If we work hard with a strong will, we _____ overcome any difficulty, however great it is．
A.
must
B.
need
C.
should
D.
can
【单选题】The cost of the air fare is higher than ______.
A.
the rail fare
B.
that of the rail fare
C.
those of the rail fare
D.
which of the rail fare
【单选题】Immediately after the Civil War, however, the diet began【C1】______ . Rail transportation increased the supply and【C2】______ the quality of the milk that reached urban centers;【C3】______ storage and re...
A.
to change
B.
changing
C.
change
D.
changed
【单选题】Large cities prefer light rail to 'heavy' rapid-rail systems because light rail requires less construction material.
A.
Y
B.
N
C.
NG
【简答题】However, the rail network is not nearly as extensive as ___________ in most countries。
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