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【多选题】
酚类主要来自工业排废，又是染料、制药、树脂含成等工业的重要原料。动、植物代谢及机体分解也有酚类物质生成，故酚类物质与人类关系极其密切。酚类物质虽毒性不高，但多有恶臭，是卫生检验的重要项目下述条目中，哪四条属挥发酚的描述？（）A.
能被水蒸气蒸馏出的酚类
B.
沸点在230℃以下的酚类
C.
对硝基酚以外的一元酚
D.
苯酚，甲酚，二甲酚以及它们的卤代物
E.
酸性条件下（PH1-3），被乙醚萃取的酚类
F.
碱性条件下（PH10-12）下，溶于水的酚类物质
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举一反三
【单选题】He wanted to know ___________.
A.
whether he speaks at the meeting
B.
when the meeting would start
C.
what he’s going to do at the meeting
D.
where would the meeting be held
【简答题】下列哪项不属于社区矫正的任务?（ ）
【简答题】A．He wonders about the usefulness of the protest. B．He thinks the present tuition is fair. C．He doesn't know how many students protested. D．He doesn't know how much the school charges for tuition.
【简答题】软件操作:在2层绘制内外砌体墙。 填空:2层内墙工程量为( )m3(保留2位小数)。
【单选题】Don't worry! He ____ no attempt to leave. He will stay here to help you.
A.
made
B.
got
C.
had
D.
Tried
【单选题】He had had a(n) ______ opportunity to get himself out of difficulty before he made that fatal mistake.
A.
feeble
B.
audible
C.
ample
D.
interim
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