A:that
B:which
C:whe
D:a
AD垂直于DC,BC垂直于DC,所以AD和BC是____,可记作:____,读作:____,或记作:____,读作:____.
读中国四大区域图回答问题
下面关于超声波或超声波的利用的说法中,不正确的是( )
根据对话内容,选择适当的选项补全对话,使对话完整。
A. She is a doctor. B. Yes. I have one aunt.
C. Good afternoon. D. Is this your aunt?
A: ____
B: Good afternoon.
A:____
B: No, this is my mother.
A: What does she do?
B:____
A: Do you have any aunts?
B:____ She is a nurse.