题目内容

常温下,某溶液中由水电离产生的c(H+)=1×10-11 mol·L-1,则该溶液的pH可能是()A.4 B.7 C.8 D.11

A. 4
B. 7
C. 8
D. 11

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相同物质的量浓度的NaCN和NaClO相比,NaCN溶液的pH较大,则同温同体积同浓度的HCN和HClO说法正确的是()A.电离程度:HCN>HClOB.pH:HClO>HCNC.与NaOH溶液恰好完全反应时,消耗NaOH的物质的量:HClO>HCND.酸根离子浓度:c(CN-)<c(ClO-)

A. 电离程度:HCN>HClO
B. pH:HClO>HCN
C. 与NaOH溶液恰好完全反应时,消耗NaOH的物质的量:HClO>HCN
D. 酸根离子浓度:c(CN-)<c(ClO-)

Many disease organisms enter the body through

A. the mouth
B. the skin
C. the small intestine
D. ears

Oral hygienic practices dose not include

A. brushing teeth or cleaning dentures
B. flossing teeth
C. the use of mouth water
D. the use of fluoride

When taking tub bath or shower, the nurse should adjust the temperature of the room and water respectively to

A. 18~22℃ and 41~46℃
B. 22~24℃ and 41~46℃
C. 18~22℃ and 40~43℃
D. 22~26℃ and 40~45℃

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