下列有关名著的说明，不正确的两项是（ ） A．《家》中，觉民热情参加进步团体的活

半透膜与滤纸一样有许多小孔，但孔径比滤纸小，为证实半透膜只能通过离子和较小的分子，胶体分散质不能通过半透膜。现把10  mL淀粉胶体和50 mL KCl溶液的混合液体加入用半透膜制成的袋内，将此袋浸入蒸馏水中。2 min后，用两支试管 各取5 mL烧杯中的液体做如下实验。

(1)向其中一支试管里滴加少量AgNO₃溶液，其现象是________________________。

(2)向另一支试管里滴加少量碘水，其现象是 ________________________________________________________________________。

(3)由上述实验现象得出的结论是______________________________________________________________________________________。

阅读理解。

     A million motorists leave their cars filled up with petrol and with the keys in the ignition (点燃) every day.

The cars are sitting in petrol stations while drivers pay for their fuel. The Automobile Association(A.A) has

discovered that cars are left unattended for an average three minutes and sometimes longer as drivers buy

drinks, sweets, cigarettes and other consumer items.With payment of credit cards becoming more and more

common, it is not unusual for a driver to be out of his car for as long as six minutes, providing the car theft

with a golden opportunity.

     For more than ten years there has been a big rise in car crime than in most other types of crime. An average

of more than two cars a minute are broken into or stolen in the UK. Car crime accounts for almost a third of

all reported offenses with no signs that the trend is slowing down.

     Although there are highly professional criminal involved in car theft, almost 90 percent of car theft is

committed by the opportunists. Amateur thieves are aided by our own carelessness. The A.A. recommends

locking up whenever you leave the car and for however short a period. A partially open sunroof or window is

a further come-on (诱惑) to thieves.

     There are many other traps to avoid. The A.A. has fond little awareness among drivers about safe parking.

Most motorists questioned made no efforts to avoid parking in quiet spots-just the places thieves love. The A.A.

advises drives to park in places with people around because thieves don't like audiences.

1. We can learn from the passage that _____.

A. there is an increasingly large number of car crimes in the UK

B. about 20% of all reported crimes involve cars

C. car crime is decreasing gradually

D. the A. A. didn't pay much attention to car crimes

2. The underlined word "opportunists" in this passage most probably refers to _____.

A. people who take chances to steal into cars

B. people who always steal or break into cars

C. highly skillful criminals

D. careless criminals who tend to fail in their crimes

3. The A. A, suggests that the car owners should _____.

A. always lock up their cars when they leave

B. keep the sunroof and windows open

C. avoid parking in crowded places

D. keep some people around to watch their cars

4. Paragraph Three mainly talks about _____.

A. the professional car criminals

B. the opportunities for non-professional car thieves

C. the anti-theft tips

D. when to lock the car

记名提单、不记名提单、指示提单都是物权凭证，因此都可以流通转让，它们的区别在于转让的方式不同。 ( )

芽胞与细菌有关的特性是（）

A、抗吞噬作用

B、产生毒素

C、耐热性

D、粘附于感染部位

E、侵袭力

漏电保护器额定漏电动作电流在（），属于高灵敏度型。

A.30mA～1A

B.30mA及以下

C.1A以上

D.1A以下