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【单选题】
使用干燥箱和恒温箱,应注意的事项有A.
使用前检查电源，要有良好的接地线
B.
箱内应保持清洁，放物网篮不得有锈，否则影响待干燥物品的洁净度
C.
塑料、有机玻璃制品的加热温度不能超过 60℃ ，玻璃制品的温度不能超过 180℃ ，使用温度不能超过干燥箱的最高允许温度，用毕要及时切断电源
D.
以上都对
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皮皮学刷刷变学霸
举一反三
【判断题】Although Nathaniel Hawthorne is ambiguous and his tales are often capable of more than one interpretation, he is at his best when writing about evil.
A.
正确
B.
错误
【简答题】请写出下列程序的输出结果。( ) intece Com{ public void speak(); } public class E { public static void main(String args[]) { Com p=new Com() { public void speak() { System.out.println("p是接...
【简答题】请写出下列程序的输出结果：x=-12if x<0: x=-xprint(x)
【简答题】He is always ready to argue things . He doesn't realize that he should think things first. The trouble with him is that his tongue always moves more quickly than his brain.
【单选题】He is taller than his elder brother. [ ]
A.
plenty of
B.
a lot of
C.
a lot
D.
a bit of
【单选题】Although he is more serious _____ his studied than I am , my grades are better than his.
A.
. with
B.
. for
C.
. about
D.
. at
【单选题】_____ he is only 8 years old, he knows more than science than his father. [ ]
A.
But
B.
Though
C.
So
D.
Because
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