什么是手术器械闭合式包装方法？
参考答案：
由2层包装材料分2次包装，并使用胶带捆扎。
In the office I never seem to have time until after 5:30 p. m., _____ many people have got home.
A whose time B. by that time
C. on which D. by which time
小儿急性阑尾炎不正确的描述是（）
A.诊断困难，并发症多
B.从新生儿至年长儿均可发生阑尾炎
C.易穿孔，且不易局限
D.婴幼儿阑尾腔不易梗阻
E.死亡率高达5％
