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【单选题】
取用无菌溶液的操作方法正确的是（）。A.
检查溶液质量时应背光检查
B.
手不可触及瓶塞盖住瓶口的部分
C.
可用无菌敷料堵塞瓶口蘸取溶液
D.
未使用完的无菌溶液可倒回瓶内
E.
剩余未污染的溶液有效期为4h
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参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【单选题】What causes wind on top of hills and mountains?
A.
cool air rising while hot air sinks
B.
cool air and hot air hitting each other
C.
hot air rising while cool air sinks
D.
cool air and rain clouds
【单选题】They have to walk_________8 country parks and___________20 hills and mountains. [ ]
A.
up; up
B.
over; over
C.
through; over
D.
along; down
【简答题】扫描仪按感光器件可分为光电倍增管(PMT)、()(CCD)和()(接触式感光器件)。
【简答题】[A]lake [ B] river [C] mountains [D] hills
【单选题】The highland zone is an area of high hills and mountains in the______of Britain.
A.
north and west
B.
north and east
C.
south and west
D.
south and east
【单选题】—Oxfam trailwalkers in Hong Kong have to climb________ twenty hills and mountains. —It’s really a tough hike.
A.
through
B.
around
C.
over
D.
along
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