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【单选题】
下面属于同时凝固缺点的是( )。A.
易产生变形
B.
易产生热裂
C.
没有补缩通道
D.
金属液用量大
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反馈参考答案：
举一反三
【单选题】She was relieved to see his face _______ with a boyish grin.
A.
light on
B.
light off
C.
light up
D.
light out
【单选题】Jim is a good son. He never _______ to write to his mother every month.
A.
fails
B.
misses
C.
loses
D.
forgets
【单选题】She was relieved to see his face _______ with a boyish grin.
A.
o light on
B.
o light off
C.
o light up
D.
o light out
【单选题】I can never forget the day _______ we worked together and the day ______ we spent together.
A.
which; when
B.
when which
C.
which which
D.
when when
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