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【单选题】
下列关于色灯信号机说法错误的是
A.
信号机有关闭和开放两种状态;
B.
信号关闭指亮禁止信号,即亮红灯或亮蓝灯;
C.
调车信号机关闭指灭灯
D.
信号开放也称为信号机允许信号或允许灯光
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举一反三
【单选题】-Need I do the repairs now? Yes,_________.
A.
you need:;but you need ask someone to help you
B.
you must;but you can ask someone to help you
C.
you need; but you can ask someone to help you
D.
you must:;but you need ask someone to help you
【简答题】人类首先提出对宇宙比较科学的认识是:()
【单选题】--Need I clean the room now? --Yes, you ___, but you ___ ask someone to help you.
A.
need, need
B.
must, can
C.
need, can
D.
must, need
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A.
16
B.
17
C.
18
【判断题】圆弧齿锥齿轮传动,两个齿轮的轴线垂直但是不相交。
A.
正确
B.
错误
【单选题】人类首先提出对宇宙比较科学的认识是:()
A.
泰勒斯
B.
苏格拉底
C.
毕达哥拉斯
D.
柏拉图
【单选题】我国劳动法规定,禁止用人单位招聘未满( )周岁的未成年人
A.
16
B.
17
C.
18
D.
19
【判断题】《戊戌政变记》是康有为上清帝第五书。
A.
正确
B.
错误
【简答题】 Dialogue 7 A : Good morning. What’s the matter? B : 1 A : Do you have a headache? B : Yes, I do. A : Open your mouth and say “Ah”. B : Ah. A : 2 B : No, I didn’t. I felt terrible last night. A : Oh,...
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