下列条件中哪些是影响变压器直流电阻测量结果的因素()。
A.空气湿度
B.上层油温
C.散热条件
D.油质劣化
参考答案:B
Word 2000编辑状态下,要将文档中的所有“E-mail替换成“电子邮件”.应使用的下拉菜单是()。
A.编辑
B.视图
C.插入
D.格式
Editorialist: Additional restrictions should be placed on driver’s licenses of teenagers because teenagers lack basic driving skills. Even though drivers of age nineteen and younger make up only 7 percent of registered drivers, they are responsible for over 14 percent of traffic fatalities. Each of the following, if true, weakens the argument that teenagers lack basic driving skills EXCEPT:
A.Teenagers tend to drive older and less stable cars than other drivers.
B.Teenagers and their passengers are less likely to use seat belts and shoulder straps than others.
C.Teenagers drive, on average, over twice as far each year as other drivers.
D.Teenagers cause car accidents that are more serious than those caused by others.
E.(E) Teenagers are likely to drive with more passengers than the average driver.