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【单选题】
在 有 机 实 验 中 用 于 萃 取 洗 涤 的 常 用 仪 器 是:A.
滴液漏斗
B.
分液漏斗
C.
漏斗
D.
三角漏斗
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举一反三
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【简答题】阅读理解。 One day at a park, a woman sat down next to a man on a bench (长椅) near a playground. “That’s my son over there,” she said, pointing to (指着) a little boy in a red sweater. 'He’s a lovely boy,” th...
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【单选题】This playground is ______ the playground we had in our high school.
A.
ten times larger
B.
ten times that of
C.
ten times as large as
D.
as large as ten times
【单选题】—Mr. Wang ______ be on the playground, I think. —He ______ be on the playground. I saw him in the office just now. [ ]
A.
may; may not
B.
can; mustn't
C.
must; couldn't
D.
may; can't
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