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单项选择题

4份0.9%氯化钠溶液、3份10%葡萄糖溶液、2份1.4%碳酸氢钠溶液的混合溶液其张力为
A 高张
B 2/3张
C 等张
D 1/3张
E 1/2张

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相关考题

单项选择题
建筑结构按8、9度抗震设防时，下列叙述( )不正确。
A.大跨度及长悬臂结构除考虑水平地震作用外，还应考虑竖向地震作用
B.大跨度及长悬臂结构只需考虑竖向地震作用，可不考虑水平地震作用
C.当上部结构确定后，场地越差(场地类别越高)，其地震作用越大
D.当场地类别确定后，上部结构侧向刚度越大，其地震水平位移越小
判断题
任何信号都可以分解为偶分量与奇分量之和。
正确
错误
单项选择题
通读下面的短文，掌握其大意。然后，从每小题的四个选择项中选出可填入相应空白处的最佳选项。
In nearly every town or city centre in the UK, on most days of the week you can find one or more people standing in the street selling a magazine 　21　 The Big Issue. These people are all 　22　, but they are not begging for money. 　23　, they are selling the magazine as a means（手段）of 　24　 a small but respectable living.
The Big Issue magazine was 　25　 in 1991 by Jon Bird and Gordon Roddick after they 　26　 that there were many homeless people who were 　27　 on the streets of London. On a previous （之前的） 　28　 to New York, one of them had seen homeless people selling a newspaper known as Street News 　29　 they decided to set up something 　30　 in the British capital.
Nowadays, The Big Issue has 　31　 all over the UK and there are even different versions（版本）of the magazine in different parts of the 　32　. The sellers buy each magazine from the organization for seventy pence and then sell it to a 　33　 for one pound fifty. By working with The Big Issue, many people have been 　34　 to escape from homelessness, and 　35　 many of them have moved on to new jobs and new lives.
____
A.spelt
B.printed
C.stuck
D.called
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