I have a basketball game ________ September. [ ]
A. at
B. on
C. in
D. of
C
有机磷中毒，烟碱样症状是
A．流涎
B．多汗
C．恶心、呕吐
D．肌纤维颤动
E．肺水肿
空间相交的两条直线所构成的角称为水平角。( )
