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问题

“翻倒，翻倒，喝得醉来吐掉，转来转去自行，千匝万匝未停。停否？停否？禾苗待我灌醉”。这首“调笑令”反映的是唐朝哪个生产工具使用时的情景

A．筒车

B．水排

C．曲辕犁

D．翻车

答案

答案：A

本题考查的是筒车。筒车是唐朝时期发明的可以实现自动灌溉的生产工具，故选A。

单项选择题

The Occupational Safety and Health Administration (OSHA) was established to protect workers from accidents and unsafe conditions on the job. There has actually been an increase in the number of job-related accidents under OSHA. This demonstrates the agency’s ineffectiveness.
Which of the following, if true, concerning the period during which the increase occurred, most seriously weakens the argument above

A．A number of job categories, excluded from the jurisdiction of OSHA in the legislation originally establishing the agency, have continued to be outside OSHA’s jurisdiction.

B．OSHA has been assigned a greater number of kinds of workplace activities to monitor.

C．There has been an increase in the total number of people at work, and the ratio of work-related deaths and injuries to size of work force has fallen in OSHA-supervised occupations.

D．Regulations issued by OSHA have met with political criticism from elected officials and the mass media.

E．(E) The increase in job-related accidents has occurred mainly in a single job category, whereas the number of job-related accidents has remained approximately constant in other categories.
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单项选择题

有载调压变压器的最大优势是能在（）的情况下，带负荷调整电压。

A.停电

B.检修时

C.不停电

D.冷备用
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