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下图为甲、固体物质的溶解度曲线。 ⑴溶解度随温度升高而增大的物质是 (填“甲”或“乙”)； ⑵某同学在t 1 ℃时进行如图2实验，充分搅拌得到相应的液体①一③。①一③形成的溶液中属于饱和溶液的是 (填序号)； ⑶在溶液③中再加入25g甲，充分搅拌，所得溶液中溶质的质量分数为 (精确到0.1%)。 ⑷若固体甲中含少量固体乙，在提纯固体甲时一定要用到的玻璃仪器有 ； ⑸若甲为KNO 3 ，如图3所示，20℃时，将饱和KNO 3 溶液 的小试管放入的烧杯中，向烧杯中加入某物质后，试管中 有晶体析出。加入的物质可能是下列中的 (填字母序号)。 A氢氧化钠固体 B生石灰固体 C冰块 D硝酸铵固体 E．浓硫酸
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【单选题】We know it is hard to make such a decision _______ he has just built up the team and the project is going through the important stage now. [ ]
A.
that
B.
as
C.
when
D.
before
【简答题】If he _____giving up smoking, he can make it. A) sets the mind on B) sets his mind on C) has a mind D) gives his mind to
【单选题】We know it is hard to make such a decision____he has just built up the team for a year and the pr
A.
15．We know it is hard to make such a decision____he has just built up the team for a year and the project is going through the important stage now. A．that
B.
as
C.
when
D.
Before
【单选题】______ he has made up his mind, no one can make him change it.
A.
Unless
B.
Once
C.
Until
D.
As
【单选题】______he has made up his mind, no one can make him change it.
A.
Although
B.
Unless
C.
Until
D.
Once
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【单选题】______ he has made up his mind, no one can make him change it.
A.
Unless
B.
Once
C.
Until
D.
As
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