影响医疗器械清洗效果的因素不包括（）
A.污物种类和自身性状
B.物体本身结构与设计
C.湿度
D.清洗温度
E.清洁剂
参考答案：C
—There is a smile on Miss Gao's face. She must be _______ with Sam's work.
—I think so. No one did as _______ as him in our class. [ ]
A. angry: well
B. pleasing; good
C. strict, good
D. pleased; well
判断一国经济处于经济周期哪一个阶段的依据有（）
A.国民生产总值
B.工业生产指数
C.就业和收入
D.价格指数
