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【单选题】
【C9】A.
contribution
B.
substitution
C.
conviction
D.
contradiction
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举一反三
【单选题】Th e workers are _______ a tall _______. [ ]
A.
build, build
B.
builder, builder
C.
builds, builds
D.
building, building
【单选题】Where is the train to Nanjing now standing?
A.
At platform. 7．
B.
At platform. 8．
C.
At platform. 9．
【单选题】The museum will open in the spring with an exhibition and a viewing platform ________ visitors can watch the big glasshouses being built. (2013·浙江，13)
A.
what
B.
where
C.
when
D.
why
【单选题】The App WeChat provides a networking platform ______ communication is faster and easier.
A.
which
B.
where
C.
when
D.
why
【简答题】能用于挥发油鉴别的物理常数有( )、( )。
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