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【单选题】
用检查离合器两圆锥面的接触情况时，色斑分布情况（ ）。A.
靠近锥顶
B.
靠近锥底
C.
靠近中部
D.
在整个圆锥表面上
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反馈参考答案：
举一反三
【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
【单选题】Three fourths of the ________ in the country have run out.
A.
water
B.
book
C.
forests
D.
news
【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.
【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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