题干
— He made few mistakes in his speech, ______________?
— ____________, his performance is wonderful.
A：didn't he; Yes, he did
B：did he; No, he didn't
C：was he; No, he isn't
D：wasn't he; Yes, he is
答案(点此获取答案解析）
B
”，命题q:“ 
”，若“p且q”为假命题，求实数a的取值范围。
do my h