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【单选题】
指定刀具长度补偿值的代码是()
A.
D
B.
H
C.
F
D.
R
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参考答案:
举一反三
【多选题】下列哪些非稳态导热情况可以采用集中参数法。
A.
物体的导热系数相当大
B.
几何尺寸很大
C.
表面传热系数极低
D.
几何尺寸很小
【单选题】Which vessel is “underway” under the Rules of the Road?
A.
A vessel at anchor with the engine running.
B.
A vessel with a line led to a tree onshore.
C.
A vessel drifting with the engine off.
D.
A vessel agrounD
【单选题】A vessel not under command sounds the same fog signal as a vessel().
A.
towing
B.
constrained by her draft
C.
under sail
D.
All of the above
【单选题】下列哪一种色谱方法是利用分子筛作用来纯化酶的( )
A.
凝胶色谱
B.
亲和色谱
C.
离子交换色谱
D.
分配色谱
【单选题】主要功能是抗病毒感染的细胞因子是( )
A.
干扰素
B.
红细胞生成素
C.
肿瘤坏死因子
D.
白细胞介素
E.
趋化因子
【多选题】下面( )的非稳态导热可用集中参数法计算。
A.
导热系数相当大
B.
几何尺寸很小
C.
表面传热系数极低
D.
导热系数和表面传热系数相当
【单选题】Which vessel is "underway" under the Rules of the Road? ______
A.
A vessel at anchor with the engine running
B.
A vessel with a line led to a tree onshore
C.
A vessel drifting with the engine off
D.
A vessel agroung
【单选题】主要功能是抗病毒感染的细胞因子是
A.
干扰素
B.
重组人促红素
C.
肿瘤坏死因子
D.
白细胞介素
E.
趋化性细胞因子
【单选题】下列对非稳态导热描述正确的是:
A.
非稳态导热中温度场不随时间变化。
B.
非稳态导热中通过各截面的热流量不随时间变化。
C.
边界条件的变化可以引起非稳态导热。
D.
非稳态导热计算应采用集总参数法。
【单选题】A fishing vessel is approaching a vessel not under command. Which statement is TRUE? ()
A.
The fishing vessel must keep clear of the vessel not under command
B.
If the vessel not under command is a power-driven vessel,she must keep clear of the fishing vessel
C.
They must exchange whistle signals
D.
Both vessels are required to take action to stay clear of each other
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