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【单选题】
哪个视图是以刀具为集合显示工序的A.
程序顺序视图
B.
机床视图
C.
几何视图
D.
加工方法视图
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举一反三
【单选题】听力原文：M: Hi. I have some good news for you. W: What is it? M: The teacher suggested that we go on a trip this Saturday. W: Oh, wonderful. Where shall we go? M: How about going to the park? W: I don't t...
A.
A teacher and a student.
B.
Classmates.
C.
Father and daughter.
D.
Mother and son.
【单选题】听力原文：M: Hi, Jane, do you have some changes? I have to make a call on the pay phone. W: Pay phone? Why not use my mobile phone? Here you are. What will the man most probably do?
A.
Get some change from Jane.
B.
Go to look for a pay phone.
C.
Use the woman's phone.
D.
Pay for the phone call.
【单选题】听力原文：M: Hi, I have some good news for you. W: What is it? M: The teacher suggests that we go on a trip this Sunday. W: Oh, wonderful. Where shall we go? M: How about going to the zoo? W: I don't think...
A.
Teacher and student.
B.
Classmates.
C.
Father and daughter.
D.
Mother and son.
【单选题】听力原文：M: Hi. I have some good news for you. W: What is it? M: The teacher suggested that we go on a trip this Saturday. W: Oh, wonderful. Where shall we go? M: How about going to the park? W: I don't t...
A.
A teacher and a student.
B.
Classmates.
C.
Father and daughter.
D.
Mother and son.
【简答题】已知电路如图所示，U S1 =6V，U S3 =4V，U S5 =11V，R 1 =2Ω，R 2 =R 3 =R 4 =R 5 =4Ω，试用节点电压法求解各支路电流I 1 ～I 5 。
【单选题】听力原文：M：Hi I have some good news for you. W：What is it? M：The teacher suggested that we go on a trip this Saturday. W：Oh，wonderful. Where shall we go? M：How about going to the park? W：I don't think it'...
A.
A trip abroad.
B.
The teacher's suggestion.
C.
A weekend activity.
D.
A future plan.
【简答题】N型半导体中自由电子是 载流子,空穴是 载流子。
【简答题】电路如图所示，给定R 1 =1Ω，R 2 =2Ω，R 3 =3Ω，R 4 =4Ω，α=2，要使U 5 =13V，试用回路分析确定电流源I S5 值。
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