高温干热灭菌烤箱内的温度须保持（）。
A.30min
B.50min
C.60min
D.70min
E.90min
参考答案：C
患者，女，49岁，颅脑外伤，拟全麻下行探查减压术。患者意识模糊，躁动不安，BP140/80mmHg，P100次／分，心肺未见异常。
首选的吸入全身麻醉药是（）。
A.氟烷
B.七氟烷
C.异氟烷
D.恩氟烷
E.地氟烷
The library along with bookstores ________ reading materials. It's open from 9?00 a. m. to 4:00
p. m. on weekdays. [ ]
A. provides
B. is providing
C. has provided
D. provided
