全池泼洒90%晶体敌百虫有效安全浓度（）。
A.0.1mg/kg
B.0.8mg/kg
C.0.7mg/kg
D.0.5mg/kg
参考答案：D
可使老年人发生尿潴留的是
A．拟胆碱药B．解热镇痛药C．拟肾上腺素药D．抗肾上腺素药E．抗胆碱药
Society _______ a variety of people; some are good, others bad, and still others in between.
A．is consisted of
B．is made up of
C．consisted of
D．make up of
