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【单选题】
下列网络图的绘制错误的有（）。【图片】A.
多个起点；
B.
多个终点；
C.
有循环回路；
D.
从箭线上引出工作;
E.
节点编号有误；
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反馈参考答案：
举一反三
【单选题】下列关于表面活性剂性质的叙述中正确者是( )
A.
有亲水基团、无疏水基团
B.
有疏水基团、无亲水基团
C.
疏水基团、亲水基团均有
D.
有中等级性基团
E.
无极性基团
【单选题】• A. The house began to leak. • B. Then leaks began in other rooms. • C. Fortunately the rain stopped then and the sun came out. • D. The bad leak started in the living room. • E. It rained steadily f...
A.
C B E A D
B.
D B C E A
C.
E A D B C
D.
B C A E D
【单选题】That ancient city was devastated by the fire, but fortunately the stone tablet survived. I assured my father that day. "Hmm," he said, __________ me, his expression skeptical.
A.
glancing at
B.
glimpsed on
C.
glancing with
D.
granting at
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