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【判断题】
释压可分为缓慢释压和快速释压两类。A.
正确
B.
错误
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举一反三
【单选题】It's too dark, and it's time to _______. [ ]
A.
light light
B.
lights lights
C.
lights light
D.
light lights
【单选题】______ travels faster than ______.
A.
The light, sound
B.
Light, the sound
C.
Light, sound
D.
The light, tile sound
【单选题】某增速齿轮箱,其输入转速为2980r/min,小齿轮齿数为n1=27,大齿轮齿数为n2=54,齿轮模数为m=2,该增速齿轮箱的输出转速为( )r/min。
A.
5960
B.
1490
C.
2980
D.
9920
【单选题】产生彩色投影必须调整下面哪个参数？
A.
Light 的Light Transmission 设为100％。
B.
Light 的Light Transmission 设为0％。
C.
投射阴影层的Light Transmission 设为80％
D.
接受阴影层的Light Transmission 设为100％
【单选题】A towing light is a yellow light having the same characteristics as a/an ______.
A.
special flashing light
B.
anchor light
C.
sternlight
D.
masthead light
【单选题】A towing light is a yellow light having the same characteristics as a(n)（）
A.
special flashing light
B.
anchor light
C.
sternlight
D.
masthead light
【单选题】Kate likes ______ clothes.
A.
the light red or white
B.
the light red or green
C.
tile light red or purple
【单选题】Which of the following is not true?
A.
Light waves are beams of light.
B.
Light waves can penetrate any materials except men' s bodies.
C.
Light waves can penetrate transparent materials.
D.
Light waves can penetrate some materials.
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