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【单选题】
气管切开使用的金属内套管。通常多长时间更换一次A.
1－2小时
B.
2－4小时
C.
4－8小时
D.
8－16小时
E.
24小时
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【简答题】It’s probably just a ______(征兆) of $3 gasoline.
【单选题】已知25 ℃时，AgCl 的溶度积 K sp=1.8×10 -10 ，则下列说法正确的是
A.
向饱和AgCl水溶液中加入盐酸， K sp 值变大
B.
AgNO 3 溶液与NaCl溶液混合后的溶液中，；一定有 c (Ag + )= c (Cl - )
C.
温度一定时，当溶液中 c (Ag + )× c (Cl - )= K sp时，此溶液为AgCl的饱和溶液
D.
将固体AgCl加入到较浓的KI溶液中，部分AgCl转化为AgI，AgCl溶解度小于AgI
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【单选题】已知25°C时,AgCl的溶度积Ksp=1.8×10-10,则下列说法正确的是
A.
向饱和AgCl水溶液中加入盐酸, Ksp变大
B.
AgNO3溶液与NaCl溶液混合后的溶液中,一定有c(Ag+)=c(Cl-)
C.
温度一定时,当溶液中c(Ag+)·c(Cl-)=Ksp时,此溶液中必有AgCl沉淀析出
D.
将AgCl加入到较浓Na2S溶液中,AgCl转化为Ag2S,因为AgCl溶解度大于Ag2S
【简答题】Surfing: It’s Not Just for Boys Any More If you asked high school girls to name their favorite sports, most would probably say basketball or volleyball. I am one of the few girls who would 21 : surfin...
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【单选题】已知25 ℃时,AgCl的溶度积K sp = 1 . 8 × 10 -10 ,则下列说法正确的是( )
A.
向饱和AgCl水溶液中加入盐酸, K sp 变大
B.
AgNO 3 溶液与NaCl溶液混合后的溶液中,一定有 c (Ag + )= c (Cl - )
C.
温度一定时,当溶液中 c (Ag + )· c (Cl - )= K sp 时,此溶液中必有AgCl的沉淀析出
D.
将AgCl加入到较浓的KI溶液中,部分AgCl转化为AgI,因为AgCl的溶解度大于AgI的
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