揭示细胞膜的物质跨膜转运机制，属于哪类研究 A．整体水平 B．局部水平 C．组织水平

阅读理解。

     Driving a car is not just handling controls and judging speed and distance. It requires you to predict what

other road users will do and get ready to react to something unexpected. When alcohol is consumed, it enters

your bloodstream and acts as a depressant (抑制药), damaging eyesight, judgment and co-ordination (协调),

slowing down reaction time and greatly increasing the risk of accidents. Even below the drink driving limit,

driving will be affected.

     Alcohol may take a few minutes to be absorbed into the bloodstream and start action on the brain.

Absorption rate is increased when drinking on an empty stomach or when consuming drinks mixed with fruit

juice. To get rid of alcohol from the body is a very slow process and it is not possible to speed it up with any

measures like taking a shower or having a cup of tea or coffee.

     The present Road Traffic Ordinance states clearly that the limit of alcohol concentration is:

     ● 50 milligrams of alcohol per 100ml of blood; or

     ● 22 micrograms of alcohol per 100ml of breath; or

     ● 67 milligrams of alcohol per 100ml of urine (尿液)

     Drivers who cause traffic accidents, or who commit a moving traffic offence or are being suspected of

drink driving will be tested.

     Any drive found drinking beyond the limit will be charged. The driver declared guilty may be fined a

maximum of HK $ 25,000 and be sentenced to up to 3 years in prison and punished for 10 driving-offence

points; or temporarily banned from driving.

     The same punishment applies to failing to provide specimens (样本) far breath, blood or urine tests without

good excuse.

     Drink driving is a criminal offence. Be a responsible driver, think before you drink. For the safety of

yourself and other road users, never drive after consuming alcohol.

1. The first paragraph is mainly about _____.

A. the introductions of driving skills

B. the damage of drinking to your body

C. the effect of drinking on driving

D. the process of alcohol being absorbed

2. The underlined word "it" in the second paragraph refers to "_____".

A. alcohol

B. absorption

C. blood

D. process

3. Which of the following is TRUE according to the passage?

A. Drinking below the drink driving limit has no effect on driving.

B. Alcohol is taken in more quickly when drunk with fruit juice.

C. Having a cup of tea helps to get rid of alcohol from the body.

D. 50 milligrams of alcohol per 100ml of breath is below the drink limit

4. A drive suspected of drink driving _____.

A. should provide specimens for testing

B. will be forbidden to drive for 3 years

C. will be punished for 10 driving-offence points

D. should pay a maximum fine of HK＄25,000

在满足焊接工艺的前提下，空载电压尽可能的（）些。

A、高

B、低

C、稳

D、变化

打开右转向灯开关，（如图所示）亮起。

开挖裂缝时，开挖沟槽的长度应超过裂缝两端各至少（）m。

A.6

B.2

C.4

D.5

表面粗糙度评定参数的选用要根据零件的功能要求、才料性能、结构特点以及（）适当选用一个或几个评定参数。

A、尺寸大小

B、公差大小

C、测量的条件

D、零件的大小