【多选题】下列哪些非稳态导热情况可以采用集中参数法。
【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.
【单选题】A vessel not under command sounds the same fog signal as a vessel().
B.
constrained by her draft
【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( )
【多选题】下面( )的非稳态导热可用集中参数法计算。
【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
【单选题】下列对非稳态导热描述正确的是:
B.
非稳态导热中通过各截面的热流量不随时间变化。
【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