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【多选题】
使用高压灭菌锅时应注意的问题有( )。A.
灭菌前要检查锅内水是否足够
B.
放置灭菌材料不要太拥挤
C.
加热到一定温度时要注意排放冷空气
D.
灭菌完毕不要打开排气阀排气冷却，降低锅内压力
E.
灭菌过程中实验人员不能离开
F.
不耐热的材料不要进行高压蒸汽灭菌
G.
灭菌完毕要自然冷却到压力后才能够打开灭菌锅
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举一反三
【单选题】In Papousek's experiment babies make learned movements of the head in order to ______ .
A.
be praised
B.
please their parents
C.
be rewarded with milk
D.
have the lights turned on
【单选题】In Papousek's experiment babies make learned movements of the head in order to______.
A.
have the lights turned on
B.
get the milk
C.
please their parents
D.
be praised
【单选题】I’m certainly not in ________of a picnic in such weather.
A.
favor
B.
favorable
C.
favourite
【简答题】I’m certainly not in
________of a picnic in such weather.A. favor B. favorable C. favorite
【简答题】听下面一段材料，回答第1至3题。 1. What advantages are mentioned about bookreading in the library? A. A better experience and a different taste. B. More convenient and quicker. C. Saving a lot of money and time. 2. ...
【简答题】favor, favorable, favorite a. I’m certainly not in ________of a picnic in such weather. b. Why not add this web page to your list of ________ pages.
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