皮皮学，免费搜题
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【单选题】
闸阀适合于安装在管径( )的管道上A.
≤50mm
B.
≥50mm
C.
≥70mm
D.
≥100mm
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皮皮学刷刷变学霸
举一反三
【简答题】自动重合闸与继电保护的配合方式有两种，即前加速和_______。
【简答题】在幻灯片窗格中输入文本的常用方法有 输入文本和 添加文本两种。
【简答题】在幻灯片窗格中输入文本的常用方法有( )输入文本和( )添加文本两种A. 在占位符中B. 使用文本框
【单选题】She was glad the difficulty, which she had thought would remain for a long time, had been ______.
A.
cleared up
B.
pulled back
C.
given in
D.
broken down
【简答题】自动重合闸与继电保护的配合方式有两种,即 _______ 和 _______ 。
【单选题】What difficulty I had _____ the dirty walls! I had no choice but to have it ____ again.
A.
clean, paint
B.
cleaning, painting
C.
cleaned, to paint
D.
cleaning, painted
【简答题】We had great difficulty (find)______ his house.
【简答题】__________(not, get)enough hands she had great difficulty in accomplishing the task.
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