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【简答题】
按照钢中有害元素硫和磷的含量，可将碳素钢分为（）钢、优质钢和高级优质钢三类。
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举一反三
【单选题】According to the passage, distance learning is basically characterized by_
A.
a considerable flexibility in its academic requirements
B.
the great diversity of students'academic backgrounds
C.
a minimum or total absence of face-to-face instruction
D.
the casual relationship between students and professors
【单选题】有人触电后，下面哪种应急措施是正确的（）
A.
用手拉触电者的身体
B.
站在干燥的木板上或穿上不带钉子的胶底鞋，用两只手拉触电者的干燥衣服
C.
赶快拉掉电源开关或拔掉电源插头
D.
就地使用铁器或潮湿的棍棒拨开触电者身上的电线或电器用具
【单选题】有人触电后,下面哪种应急措施是正确的?
A.
就地使用铁器或潮湿的棍棒拨开触电者身上的电线或电器用具
B.
用手拉触电者的身体
C.
站在干燥的木板上或穿上不带钉子的胶底鞋，用两只手拉触电者的干燥衣服
D.
拉掉电源开关或拔掉电源插头
【简答题】私人教练员的接待技巧包括什么?
【单选题】According to the passage , distance learning is basically characterized by_____
A.
A considerable flexibility in its academic requirements
B.
The great diversity of students' academic backgrounds
C.
A minimum or total absence of face-to-face instruction
D.
t the casual relationship between students and professors
【单选题】According to the passage, distance learning is basically characterized by_
A.
a considerable flexibility in its academic requirements
B.
the great diversity of students'academic backgrounds
C.
a minimum or total absence of face-to-face instructio
D.
the casual relationship between students and professors
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