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【单选题】
某粗集料在19mm与16mm筛的通过率均为100%,在13.2mm筛上的筛6%,则此粗集料的最大粒径为( )。A.
19㎜；
B.
16㎜；
C.
13.2㎜
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皮皮学刷刷变学霸
举一反三
【单选题】语言形成的过程要经过以下()个阶段。
A.
声学阶段→语言阶段→语言阶段→语言阶段→生理阶段
B.
声学阶段→生理阶段→语言阶段→生理阶段→声学阶段
C.
声学阶段→语言阶段→声学阶段→生理阶段→语言阶段
D.
语言阶段→生理阶段→语言阶段→生理阶段→声学阶段
E.
语言阶段→生理阶段→声学阶段→生理阶段→语言阶段。
【单选题】Three fourths of the surface of the earth ___ covered withwater.
A.
are
B.
is
C.
was
D.
were
【单选题】Three fourths of the surface of the earth ______ covered with water.
A.
are
B.
is
C.
will be
D.
was
【简答题】论述活性污泥法中丝状菌污泥膨胀的概念、危害和评价指标
【简答题】were/is (1)Three fourths of the teachers present _____ against the plan. (2)Three fourths of the suce of the earth ______ covered with water.
【简答题】衬叶可以修剪变曲造型吗?都有哪些形式和方法?
【单选题】Three fourths of the teachers _____ against the plan,and three fourths of the plan _____ hard for them to carry out.
A.
was; is
B.
were, is
C.
was; are
D.
were; are
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