How are you, my students?
A. Fine, thanks. And you?
B. Hello, my name is Mary.
C. Nice to meet you, too.
查看答案
How are you today, Jane?
A. Goodbye, Jane. Have a nice evening.
B. Fine, thanks. And you?
C. I’m doing OK.
Goodbye, Mary. See you tomorrow.
A. Hello, my name is Mary.
B. Goodbye, Jane. Have a nice evening.
C. I’m doing OK.
四阶行列式的计算可以使用对角线法则。
A. 对
B. 错
如果行列式的某一行全为0，则行列式的值为0.
A. 对
B. 错
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