不宜用压力蒸汽灭菌的消毒物品有（）
A.密闭的干燥容器
B.不耐高热的物品
C.不耐高压的物品
D.不穿透热的物品
E.以上都不宜
参考答案：E
For many years, the principle goal of computer (73) was to write short pieces of code that would execute quickly. The (74) needed to be small, because memory was expensive, and it needed to be fast ,because processing power was also expensive.
A. users B. programmers C. thatD. program
lac操纵子的诱导剂是（）
A.半乳糖
B.乳糖
C.阿拉伯糖
D.葡萄糖
E.蔗糖
