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【单选题】
下列有关溶液(固体溶质)的叙述正确的是(  )
A.
不饱和溶液转化为饱和溶液,溶液中溶质的质量分数一定增大
B.
将5g某物质完全溶解于95g水中,所得溶液中溶质的质量分数不一定是5%
C.
任何物质的饱和溶液当温度降低时一定会析出晶体
D.
饱和溶液析出晶体后,剩余溶液中溶质的质量分数一定减小
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参考答案:
举一反三
【单选题】对涉及结构安全的试块,试件和材料见证取样和送检的比例不得低于有关技术标准中规定取样数量的()
A.
30%
B.
40%
C.
50%
D.
60%
【单选题】After a few minutes, my blood pressure became normal and I was allowed to .
A.
sit
B.
sit up
C.
stand up
D.
run away
【单选题】We usually discuss business after a few minutes of general discussion.
A.
In Germany
B.
In America
【单选题】对涉及结构安全的试块、试件和材料见证取样和送检的比例不得低于有关技术标准中规定取样数量的()
A.
10%
B.
20%
C.
30%
D.
40%
【简答题】下列各句均有一处错误,请找出并改正。 1.After a few minutes he came to myself and said, 'Don't worry,I'm OK.'______ 2.Xiao Ming,don't play the water in the bottle.______ 3.After the accident he lay on the road and almos...
【简答题】After a few minutes we found we had loads of things in common. We just got __________ like a house on fire.
【单选题】涉及结构安全的试块、试件和材料见证取样和送检的比例不得低于有关技术标准中规定的应取样数量的( )。
A.
25%
B.
20%
C.
50%
D.
30%
【多选题】彝族口味上爱好( )。
A.
B.
C.
D.
E.
【简答题】小医生,下列各句均有一处错误,请找出并改正。 1.After a few minutes he came to myself and said, “Don’t worry,I’m OK.”________ 2.Xiao Ming,don’t play the water in the bottle. ________ 3.After the accident he lay on the road ...
【单选题】The medicine started to __________ after a few minutes.
A.
take a effect
B.
take effect
C.
take an effect
D.
take the effect
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