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【单选题】
CO2其他没有()特点。
A.
焊接时可以使用固态和气体CO2
B.
在电弧高温下发生分解
C.
无色、无味
D.
熔化极焊接时要使用干燥后的CO2气体
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【判断题】接触器是一种自动的电磁式开关。
A.
正确
B.
错误
【判断题】接触器是一种自动的电磁式开关。
A.
正确
B.
错误
【单选题】—Your shirt is nice. —______. [     ]
A.
Yes, it is
B.
Here you are
C.
Thank you
D.
Here it is
【简答题】完形填空。 This is 1 photo 2 my room. Can you see my bed? It is here. It is nice. These 3 my books. They are 4 . My dictionary 5 on a chair. Look! What's that? It's 6 .What color is 7 ? Do you know? 8 gree...
【单选题】不同的人由于生活经历、人生境遇、认识水平等的不同,会形成不同的甚至对立的 人生目的。当代大学生应该确立的高尚的人生目的是
A.
为人民服务
B.
为家庭求温饱
C.
为个人谋财富
D.
为朋友两肋插刀
【单选题】— Mum, it is nice weather.I want to skate this afternoon. — Don't you think the ice on the lake is too thin to________your weight? [     ]
A.
carry
B.
bear
C.
catch
D.
take
【单选题】-- ______ It is nice talking to you. -- Same here. I will see you.
A.
Good for you.
B.
It is getting late.
C.
I have got to go.
【多选题】我国铁路固定信号包括( )。
A.
进站信号机
B.
通过信号机
C.
出站信号机
D.
火炬
E.
机车信号
【单选题】—Mum, it is nice weather. I want to skate this afternoon. —Don’t you think the ice on the lake is too thin to ________ your weight.
A.
stand
B.
catch
C.
bear
D.
take
【判断题】A群体标准差为5,B群体的标准差为12, B群体的变异一定大于A群体。
A.
正确
B.
错误
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