700型线岔的长度是()。A、700mm B、1510mm C、1700mm D、1

题型:单项选择题

问题:

700型线岔的长度是()。

A、700mm

B、1510mm

C、1700mm

D、1850mm

考点:接触网工考试初级接触网工初级接触网工题库
题型:单项选择题

第三部分:阅读理解(共20小题;每小题2分,满分40分)

阅读下列短文,从每题题所给的四个选项(A、B、C、D和E)中选出最佳选项。

Sitting too much is now listed with smoking and junk food as a bad habit that increases your risk of heart disease.

New Australian research shows that half-an-hour in the gym will not make up for the waist-expanding damage caused by spending the rest of the day sitting.

But the good news is that doing chores in the house or gently walking around the office while on the phone might be enough to keep you fit.

The study joins the growing body of evidence suggesting too much sitting might undo the benefits of exercise.

The study measured the intensity of physical activities in 168 subjects over seven days. It found that, regardless of how much exercise they did or their total sitting time, those who took more breaks from sitting had lower risk of thick waists and lower levels of blood lipids(脂肪).

“Higher levels of blood lipids have been linked to a heightened risk of heart disease,” principal researcher Genevieve Healy of the University of Queensland said. “What the study shows is that there are benefits in just getting up regularly and interrupting your sitting time.”

Researchers behind the Stand Up Australia project have written to the Rudd Government requesting $3.5 million for a two-year study into the impact of long sitting time on health and productivity of workers. The study would also develop and test strategies for reducing sitting time on the job.

The latest study builds on work that is shifting the health promotion focus from purposeful exercise, such as running, to lower intensity activities throughout the day.

The Australian research has been hacked up by US studies.

“To hold a body that weighs 77 kilograms upright takes a fair amount of energy from muscles,” said Professor Marc Hamilton from the University of Missouri. “There is a large amount of energy associated with standing every day that cannot easily be replaced by 30 to 60 minutes in the gym.”

56. What’s the aim of the Stand Up Australia project?

A. To study the factors influencing productivity of workers.

B. To study the reasons for the longer sitting time at work.

C. To develop and test strategies for reducing sitting time in the office.

D. To develop and test strategies for reducing working time.

57. The purpose of the last paragraph is to       .

A. provide a scientific basis for the benefits of standing up

B. Compare the effect of standing with exercising in the gym

C. report the new research findings of professor Marc Hamilton

D. figure out the amount of energy associated with daily standing

58. What’s the best title for the text?

A. Exercise in the Gym Is Out.

B. Your Office Chair Is Killing You.

C. A Cause of Heart Disease.

D. Good News for Workers.

题型:单项选择题

信息结构图是BSP对企业长期数据资源规划的图形表示,下述:
Ⅰ.每一系统的范围
Ⅱ.产生、控制和使用的数据
Ⅲ.系统与系统间的关系
Ⅳ.对给定过程的支持
Ⅴ.系统间的数据共享
( )是结构图能勾画出的内容。

A.Ⅰ、Ⅱ、Ⅲ

B.Ⅱ、Ⅲ、Ⅳ

C.Ⅲ、Ⅳ、Ⅴ

D.全部

题型:单项选择题

置换滴定法是先向被测溶液中加入另一种物质使之反应,置换出一定量能被滴定的物质来,然后用适当的滴定剂进行滴定。

题型:单项选择题

国际法律责任的主体与国际法的主体基本上是相同的。个人虽不是国际法的主体,但可以成为国际法律责任的主体。

题型:单项选择题

Windows2000专业版对硬件的兼容性应该比Windows98要()

A、坏

B、好

C、一样

D、不一定

更多题库