问题 选择题

在程序框图中,具有赋值、计算功能的基本程序框是(  )

A.终端框(起止框)

B.输入、输出框

C.处理框(执行框)

D.判断框

答案

起止框:表示一个算法的起始和结束,是任何流程图不可少的.

输入、输出框:表示一个算法输入和输出的信息,可用在算法中任何需要输入、输出的位置.

处理框:赋值、计算,算法中处理数据需要的算式、公式等分别写在不同的用以处理数据的处理框内.

判断框:判断某一条件是否成立,成立时在出口处标明“是”或“Y”;不成立时标明“否”或“N”.

∴在程序框图中,具有赋值、计算功能的基本程序框是处理框(执行框).

故选C.

单项选择题
阅读理解

Driving a car is not just handing 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, judgement 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 driver 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) for 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.

小题1: The first paragraph is mainly about       .

A.the introduction 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小题2: The underlined word “it” in the second paragraph refers to “       ”.

A.alcohol

B.absorption

C.blood

D.process小题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 driving limit.