汽油机一般由两个机构和五个系统组成，五个系统是燃料供给系、点火系、冷却系、润滑系和启

数电-0011001的补码为10011001。

A major new development in system of work in Britain is taking place. Flexible working hours, or “Flextime”, are catching on fast, and trend is continuing. In 1973, over 500 organizations had adopted the idea, and by 1974, this number had risen to over 200,000.

Flexible working hours were invented in Germany in the late 1960’s, but reached Britain only in 1972. The system allows workers to start and finish work whenever they want, with only two requirements. These are, firstly, that all workers must present for certain “key” times in the day, and secondly, that all workers must work an agreed total number of hours per week.

The system had proved a total success wherever it has been tried. A survey of 700 workers on flexible hours showed three main advantages: a better balance between working and private life, avoidance of the need to travel during rush hours and the ability to finish a certain task before leaving.

From the employer’s point of view, the system tends to increase productivity, reduce labour turnover and give workers a greater sense of duty. At first, “Flexible” was mainly confined to white-collar workers, but it is now being applied to manual workers too.

小题1:According to “Flextime” system, workers need not _________.

A．work at the same time

B．work all the weekdays

C．work hard

D．ask for leave when being absent小题2:“Key” time is a period when _________.

A．visitors come to the plants

B．all workers must be at work

C．employers go round in the workshop

D．rush hours are over小题3:No matter where it is used, this system has proved _________.

A．entirely effective

B．totally correct

C．a complete failure

D．quite difficult小题4:One of the great advantages of “Flextime” for workers is that they _________.

A．have a great sense of duty

B．can avoid busy traffic

C．can get higher pay

D．can avoid working hard

一般而言，金融资产的流动性与风险性、收益性之间的关系存在( )。

A．正相关

B．负相关

C．不相关

D．不确定关系

植物细胞中，不能形成ATP的场所是（）

A.细胞质基质

B.叶绿体基粒片层结构

C.叶绿体基质

D.线粒体

被胁迫