众多种类的毒品之中有很多的致幻类药品,这其中有迷幻剂药物的代表,它是已知药力最强的致幻剂。它是()
A.K粉
B.三唑伦
C.麦角酰二乙胺
D.可卡因
参考答案:C
I want to thank my friend John, without _____ help, I wouldn't have been saved.
A.his
B.whose
C.whom
D.Which
描述飞机在空间姿态的姿态角有:().
A、迎角,偏航角,滚转角
B、滚转角,偏航角,俯仰角
C、俯仰角,侧滑角,滚转角
D、迎角,侧滑角,滚转角