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问题 选择题

下列关于溶液说法正确的是（　　）

A．溶液一定是无色透明的

B．溶质一定是固体

C．饱和溶液一定是浓溶液

D．不饱和溶液变成饱和溶液，其溶质质量百分比浓度不一定增大

答案

A、硫酸铜溶液是蓝色的，氯化铁溶液是黄色的，说法错误；

B、溶质可以是固体，也可以不是如稀盐酸，溶质是氯化氢气体；说法错误；

C、饱和溶液不一定是浓溶液，如氢氧化钙的饱和溶液就是稀溶液．说法错误；

D、不饱和变为饱和可以通过改变温度则其溶质质量分数保持不变；说法正确；

故选D．

单项选择题 A1/A2型题

烧伤感染中最主要的病原菌侵入途径（）。

A.烧伤创面感染

B.静脉导管感染

C.呼吸道感染

D.肠源性感染

E.尿路感染（留置导尿所致）
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单项选择题

Walking through my train yesterday, staggering from my seat to the buffet and back, I counted five people reading Harry Potter novels. Not children-these were real grown-ups reading children’s books,
Maybe that would have been understandable. If these people had jumped whole-heartedly into a second childhood it would have made more sense. But they were card-carrying grown-ups with laptops and spreadsheets returning from sales meetings and seminars. Yet they chose to read a children’s book.
I don’t imagine you’ll find this headcount exceptional. You can no longer get on the London Tube and not see a Harry Potter book. Nor is it just the film; these throwback readers were out there in droves long before the movie campaign opened.
So who are these adult readers who have made JK Rowling the second-biggest female earner in Britain (after Madonna) As I have tramped along streets knee-deep in Harry Potter paperbacks, I’ve mentally slotted them into three groups.
First come the Never-Readers, whom Harry has enticed into opening a book. Is this a bad thing Probably not. Writing has many advantages over film, but it can never compete with its magnetic punch. If these books can re-establish the novel as a thrilling experience for some people, then this can only be for the better. If it takes obsession-level hype to lure them into a bookshop. that’s fine by me. But will they go on to read anything else Again, we can only hope.
The second group are the Occasional Readers. These people claim that tiredness, work and children allow them to read only a few books a year. Yet now—to be part of the crowd, to say they’ve read it—they put Harry Potter on their oh-so-select reading list. It’s infuriating, and maddening. Yes, I’m a writer myself, currently writing difficult, unreadable, hopefully unsettling novels, but there are so many other good books out there, so much rewarding, enlightening, enlarging works of fiction for adults; and yet these sad cases are swept along by the hype, the faddism, into reading a children’s book.
The third group are the Regular Readers, for whom Harry is sandwiched between McEwan (英国当代作家) and Balzac, Roth (德国现代诗人) and Dickens. This is the real baffler—what on earth do they get out of reading it Why bother But if they call rattle through it in a week just to say they ve been there—like going to Longleat (朗利特山庄英国名胜) or the Eiffel Tower—the worst they’re doing is encouraging others.

The word "infuriating" underlined in Paragraph 6 is closest in meaning to ______.

A．vexing

B．angry

C．displeasing

D．unhappy
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