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单项选择题
干燥器中放入的干燥剂一般为( )
A、无水硫酸钠
B、熟石灰
C、变色硅胶
D、氢氧化钠
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相关考题
单项选择题
Why did the fire god and the water god fight? A.
Because the fire god caused disasters on the earth. B.
Because the water god caused disasters on the earth. C.
Because the fire god and the water god disliked each other.
多项选择题
数字传输系统现采用QPSK调制传输数据,若使传输带宽保持不变,比特率增加,则可选用的调制方式有?
A、2PSK
B、4PSK
C、8PSK
D、16PSK
多项选择题
If you want to choose some souvenir for you clients or associates, what would be more suitable?
A、Scissors
B、Four Treasures of the Study
C、Toys
D、Peking Opera Masks
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