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【单选题】
食品中细菌总数检测时,对于固体样品,1:10样品液配制常用的方法是A.
1克样品+9ml生理盐水
B.
10克样品+90ml生理盐水
C.
20克样品+180ml生理盐水
D.
25克样品+225ml生理盐水
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皮皮学刷刷变学霸
举一反三
【单选题】When _______cruel man was hurting the children, there were no adults around who were able to stop______hurting.
A.
the, the
B.
the, 不填
C.
a,不填
D.
a, a
【简答题】翻译下面的句子。 The man his sight in the accident. The children were out of sight. They run away. There were no more mountains in sight.
【简答题】以__________为界,一半画外形图一半画__________的投影图称为半剖面图。
【简答题】定义并使用isPrime()函数,该函数用于判断给定的整数是否素数。参数为整数,要有异常处理。如果整数是素数(质数),函数返回True,否则返回False。
【单选题】The children were suffering from ______ because they had no one to look after them.
A.
ignorance
B.
illiteracy
C.
disregard
D.
neglect
【简答题】对称的形体需画剖视图,可以( )为界,一半画视图(外形图),一半画剖面图。
【简答题】4. Since there was
no school on Monday, the children were allowed to stay up late on Sunday. A. Reason B. Condition C. Time
【单选题】The children were catching butterflies in the garden. Some caught a lot, and others caught _______at all.
A.
nothing
B.
none
C.
no one
D.
neither
【简答题】The students were having their chemistry class. Miss Li was telling the children what water was like. After that, she asked her students, “What’s water?” No one spoke for a few minutes．Miss Li asked a...
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