融化和复冻过的新鲜冰冻血浆：（）
A.可供临床使用；
B.需细菌培养后供临床使用；
C.必须废弃；
D.经领导批准后使用
参考答案：C
阅读理解
1. When do they stop serving dinner?
A.10:00 am.
B.10:30 pm.
C.2:00 pm.
D.9:30 pm.
2. How much do a small hamburger and a large soft drink cost?
A. $3.9.
B. $3.95.
C. $4.1.
D. $4.9
3. How many kinds of things have chocolate in them?
A. One.
B. Two.
C. Three
D. Four.
旅游安全管理工作应遵循什么原则？
