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【单选题】
非金属元素碳在860 °C 固溶于形成间隙固溶体,其晶体结构为( )A.
体心立方结构
B.
面心立方结构
C.
密排六方结构
D.
体心四方结构
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反馈参考答案：
举一反三
【简答题】在施工成本计划中，（ ）是选派项目经理阶段的预算成本计划，并且是项目经理的责任成本目标。
【简答题】阅读理解。 The moon travels around the earth. The moon does this because gravity pulls it. Gravity is the pulling action of large objects such as planets and stars. Most nights, the moon is the brightest t...
【单选题】From the book, my brother learned that the moon around the earth.
A.
is moving
B.
moved
C.
moves
D.
has moved
【单选题】The exciting news has spread all over the world______the satellite around the moon succeeded in returning to the earth.
A.
which
B.
that
C.
whether
D.
what
【单选题】Gravitation keeps the Moon orbiting around the Earth.
A.
pulling
B.
drawing
C.
moving
D.
missing
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