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【单选题】
制备5%碘的水溶液,通常可采用以下哪种方法()
A.
制成酯类
B.
制成盐类
C.
加助溶剂
D.
采用复合溶剂
E.
加增溶剂
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A.
正确
B.
错误
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A.
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B.
确认
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D.
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A.
255.255.255.192
B.
255.255.255.224
C.
255.255.255.240
D.
255.255.255.248
【简答题】6) If they were here tomorrow, the problem (solve) _______________.
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【单选题】IP 地址块192.168.15.136/29的子网掩码可写为
A.
255.255.255.248
B.
255.255.255.240
C.
255.255.255.192
D.
255.255.255.224
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