治疗小儿肺炎喘嗽风热闭肺轻证，应首选
A．桑菊饮 B．银翘散 C．抱龙丸 D．安神丸 E．麻杏石甘汤
参考答案：B
— How long_________in Hong Kong?
— For just the weekend. I’ll be back next Monday morning.
A．have you stayed
B．are you staying
C．did you stay
D．do you stay
质量为200 g的物体，测得它的加速度为10 cm/s2，则关于它所受合力的运算，既正确又符合一般要求的是[ ]
A．F= 200×10=2 000 N
B．F=0.2 kg×0.1=0. 02N
C．F=0.2×0.1=0. 02
D．F=0.2×0.1 N=0.02N
