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【单选题】
对回返性抑制的叙述，错误的是:A.
多发生在传出途径中
B.
轴突侧支活动使抑制性中间神经元兴奋
C.
该抑制使原先发生兴奋的神经元活动增强
D.
其作用是使神经元活动及时终止或许多神经元活动步调一致
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举一反三
【单选题】The ______ of seawater into drinking water is a complicated problem.
A.
conversion
B.
conjecture
C.
concession
D.
contraction
【简答题】试述母乳喂养的优点。
【简答题】试述母乳喂养的优点。
【单选题】The ballasting pump can be replaced with the main seawater pump. 02010503
A.
The main seawater pump can be replaced with the ballasting pump.
B.
The main seawater pump can replace the ballasting pump.
C.
The ballasting pump can be replaced with the fire-fighting pump.
D.
The ballasting pump can be replaced with the auxiliary seawater pump.
【单选题】___ with a gradual rise of seawater, some nations in the Pacific are considering moving in the near future. [ ]
A.
Facing
B.
To face
C.
Faced
D.
Being faced
【单选题】The exposed portion of the outboard propeller shaft is protected against seawater corrosion by____
A.
A layer of oxidation formed when the metal of the shaft is exposed to seawater
B.
A covering of plastic, rubber, or shrunk-on compositon sleeve
C.
A corrosion-resistant paint
D.
A heavy lubricant
【简答题】试述母乳喂养的优点。
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