洁净室应维持一定的()。
A.负压
B.正压
C.压差
D.压力
E.高压
参考答案:B
解析:[知识点] 《医疗机构制剂配制质量管理规范(试行)》房屋、设施、物料
“美国电影协会”
An investor purchases a 10 - year, $1000 par value bond that pays annual coupons of $100. If the market rate of interest is 12 percent, what is the current market value of the bond()
A. $ 950.
B. $1100.
C. $ 887.