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【简答题】
The speech which he made __________ the ? The speech which he made __________ the project has bothered me greatly. A) being concerned B) concerned C) be concerned D) concerning
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举一反三
【单选题】Nothing but one desk and six chairs ________ in the room.
A.
are
B.
is stayed
C.
is
D.
are left
【简答题】E4303、E5003属于()药皮类型的焊条。