题干
The teacher told us _______in bed.
A：don't read
B：read not
C：to not read
D：not to read
答案(点此获取答案解析）
D
The teacher told us _______in bed.
A：don't read
B：read not
C：to not read
D：not to read
在点（1、3）外的切线的倾斜角为（ ）