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【判断题】
普通行星齿轮差速器主要由行星齿轮、行星齿轮轴、半轴齿轮和差速器壳等组成。A.
正确
B.
错误
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举一反三
【单选题】Which of the following is a mathematical statement of the first law of thermodynamics?
A.
ΔV = (nR/P)ΔT
B.
ΔE = q + w
C.
ΔH = ΔE + PΔV
D.
ΔG = ΔH – TΔS
【单选题】According to the passage, which of the following is one of the first things to occur when cells are injured?
A.
The flow of electrical impulses through nerve cells at the site of the injury is broken.
B.
The production of substance P traveling through nerve cells to the brain increases.
C.
Endorphins begin to speed up the response of nerve cells at the site of the injury.
D.
A flood of prostaglandins sensitizes nerve endings at the site of the injury.
E.
Nerve cells connected to the spinal cord become electrically quiescent.
【简答题】What is “3P” theory? Which factor is considered first in the “3P” theory when paying bonus?
【单选题】一远视眼的近点在眼前1.5m处,要使其看清眼前15cm处的物体,则应配戴的眼镜为:( )
A.
-600度的凹透镜
B.
-750度的凹透镜
C.
600度的凸透镜
D.
750度的凸透镜
【简答题】Decide which sentences describe the present and which forecast weather. Write “P” for present or "F" for forecast. The first is done for you.
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