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扭转实验得到的力学性能指标τb代表什么？

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下列判断错误的是( )

A. 向量组的部分组相关,则向量组整体相关
B. 向量组整体无关,则任意部分组无关
C. 含有零向量的向量组必线性相关
D. 任意向量组都存在最大无关组

Dialogue 1G: Good afternoon. I’m Elizabeth Lynne. I just got to Hangzhou from Singapore. (1 ) .R: Welcome to Hangzhou. Let me see. Miss Lynne. (2)G: Yes, of course.R: Is that a double room?G: I am afraid not. Yes, here, ( 3 ).R: All right. Let me see. (4 )?G: Ok, no problem.R: Yes, I got your room. And Miss Lynne, ( 5 )?G: How about traveler’s cheques?R: Sure, thanks!G: You’re welcome.50

A. I made a reservation before my trip.
B. I made a reserve before my trip.
C. I booked a room before my trip.
D. I made a call before my trip.

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Dialogue 1G: Good afternoon. I’m Elizabeth Lynne. I just got to Hangzhou from Singapore. (1 ) .R: Welcome to Hangzhou. Let me see. Miss Lynne. (2)G: Yes, of course.R: Is that a double room?G: I am afraid not. Yes, here, ( 3 ).R: All right. Let me see. (4 )?G: Ok, no problem.R: Yes, I got your room. And Miss Lynne, ( 5 )?G: How about traveler’s cheques?R: Sure, thanks!G: You’re welcome.

A. Do youhave a confirmon your reservation?
B. Do you have a confirm of your reservation?
C. Do you a confirmationon your reservation?
Do you a confirmationof your reservation?

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Dialogue 1G: Good afternoon. I’m Elizabeth Lynne. I just got to Hangzhou from Singapore. (1 ) .R: Welcome to Hangzhou. Let me see. Miss Lynne. (2)G: Yes, of course.R: Is that a double room?G: I am afraid not. Yes, here, ( 3 ).R: All right. Let me see. (4 )?G: Ok, no problem.R: Yes, I got your room. And Miss Lynne, ( 5 )?G: How about traveler’s cheques?R: Sure, thanks!G: You’re welcome.

A. onedouble rooms for two nights until 10th
B. twodouble rooms for two nights until 10th
C. one single room for two night until 10th
D. one single room for two nights until 10th

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