题目内容

下列哪种说法正确()

A. 分离非极性组分一般选用极性固定液
B. 色谱柱寿命与操作条件无关
C. 汽化室的温度要求比样品组分的沸点高50—100℃
D. 相对校正因子不受操作条件影响,只随检测器种类不同而改变

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()十一切法治社会遵循的一条重要原则。

As a frame leaves a Layer 3 device, the Layer 2 encapsulation information is changed from what it was when it entered the devicE.For what two reasons can this happen? ()

A. The data is moving from 10BASE-TX to 100BASE-T
B. The WAN encapsulation type has changed.
C. The data format has changed from analog to digital.
D. The source and destination hosts are in the same subnet.
E. The source and destination MAC addresses have changed.

混凝土的裂缝有:沉陷缝、干缩缝、温度缝、()。

微机保护装置打印出的各项定值与网调下发的定值通知单各项定值误差必须满足以下要求()必须相同,()必须相同,起动值IQD误差不大于()%,其它各项定值误差不大于()%。

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