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问题 填空题

下表是某正常人的血浆、原尿、尿液中的主要成分的浓度比较。请你分析此表，回答下面问题：（单位：克/升）

物质
蛋白质
葡萄糖
尿素
尿酸
无机盐
A
8.5
1.0
0.3
0.02
7.5
B
1.2
1.0
0.3
0.02
7.5
C
0.0
0.0
20
0.5
16

（1）根据表中数据分析：A是________，B是_________，C是________。（2）表中蛋白质由A中的8.5克/升变成1.2克/升，这是由于_________________________________。（3）葡萄糖由A到B，再到C的过程中，A 和B的浓度均为1克/升，而C中浓度变为0/升，出现这一结果的原因是_____________________________________________。（4）尿酸、尿素、无机盐在A和B中的浓度相同，说明这些物质_______________________。在C中这些物质的浓度都高于B，这主要是因为____________________________________________。

答案

（1）血浆；原尿；尿液

（2）血浆中的大分子蛋白质不能过滤形成原尿中的成分

（3）葡萄糖能够从血浆中过滤到原尿中，原尿中的葡萄糖在形成尿液时又全部被重吸收了。

（4）都能过滤形成原尿中的成分；这些物质重吸收很少，但大部分水又被重吸收了，因此尿液中它们的浓度高于原尿。

选择题

English is a language that many young people around the world ____ not speak perfectly but at least ____

understand. [ ]

A. may; can

B. would; might

C. will; must

D. could; might

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单项选择题

Questions 16～20


Napoleon famously described the British as a nation of shopkeepers. These clays it would be equally true to describe them as a nation of shoppers. Either way, London is the UK’s shopping mecca; if you can’t find it here you probably can’t find it at all.
Some London shops are more or less tourist attractions in their own right. Few visitors come away without popping into Harrods. This famous store is a real one-off. The toilets are lab, the food hall enough to make you swoon, and if they haven’t got what you want, it probably doesn’t exist. No other store has such a sense of sheer, outrageous abundance. Since Absolutely Fabulous brought Edina and Patsy steaming onto our screens, Harvey Nichols ("Harvey Nicks") has become another must-see attraction. It boasts a great food hall, an extravagant perfume department and jewellery to save up for. But with all the big names from Miyake to Lauren, Hammett to Calvin Klein and a whole floor of up-to-the-minute menswear, it’s fashion that Harvey Nichols does better than the rest. The selection is unrivalled and the prices high, although the sales offer some great bargains, and the store’s own clothing line is reasonable.
Carnahy Street still reeks of the 60s although it’s had something of a revival since the "Cool Britannia" kick brought Union Jack dresses back into fashion. The last punks have long since slunk away from Chelsea’s King’s Rd but there are still plenty of interesting shops slotted in amid the high-street chains.
Oxford St and classier Regent St come into their own in the six weeks running up to Christmas when they’re festooned with lights. At other times of the year Oxford St can be a great disappointment. Selfridge’s is up there with Harrods as a place to visit and the farther east you go the tackier and less interesting it becomes.
Although most things can be bought in most parts of town, there are also streets with their own specialties; Tottenham Court Rd, for example, is one long electrical goods shop (watch out for rip-offs though), while Charing Cross Rd is still the place to come for offbeat books.
Many tourist attractions have excellent shops selling good-quality souvenirs like mugs, pens, pencils, stationery and T-shirts, often with themes to match their content (war books and videos at the Imperial War Museum). By buying from these shops you help contribute towards the building’s maintenance, especially important in the cases of those without entry charges.

The word "revival" (para. 3) means ______.

A. cooling off
B. holding sway
C. coming back
D. firing up
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