公安机关的职责是由公安机关的性质和职权决定的。 ( )
参考答案:错
小题1:—Hi! Sam, how are you doing?
—________.
A. That’s OK
B. Very well, thanks
C. Never mind
小题2:—I think there is too much rain this spring.
—________. It causes many floods.
A. I agree with you
B. I’m not sure
C. I’m all right
小题3:—Don’t be late again.
—________. I will be on time next time.
A. Yes, I will
B. No, I don’t
C. Sorry, I won’t
小题4:—I dare not speak English in class.
—________. You should believe in yourself.
A. That’s all right
B. Don’t be shy
C. That’s nothing
小题5:—________?
—Sure. We’d like some rice, chicken and vegetable soup.
A. May I come in
B. May I go with you
C. May I take your order
中药害虫致死高温区的温度范围是
A.35~40℃
B.45~50℃
C.50~60℃
D.65~70℃
E.85~90℃