已知f(x)的一个原函数为，则∫xf’(2x)dx=______．_爱下问搜题

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问题填空题

已知f(x)的一个原函数为，则∫xf’(2x)dx=______．

答案

参考答案：

解析：

[分析]：令2x=u，则

单项选择题 A型题

关于Q波的描述，错误的是（）。

A.aVR导联Q波再大也无意义

B.QRS心电轴左偏时，Ⅲ、aVF导联可出现Q波

C.QRS心电轴右偏时，aVL导联可出现Q波

D.异常Q波表明有心肌坏死

E.心肌梗死不一定有异常Q波

完形填空

Charlotte Whitehead was born in England in 1843, and moved to Montreal, Canada at the age five with her family. While         her ill elder sister throughout the years, Charlotte discovered she had a(an)          in medicine. At 18 she married and          a family. Several years later, Charlotte said she wanted to be a          . Her husband supported her decision.
         , Canadian medical schools did not          women students at the time. Therefore, Charlotte went to the United States to study          at the Women’s Medical College in Philadelphia. It took her five years to         her medical degree.
Upon graduation, Charlotte         to Montreal and set up a private        . Three years later, she moved to Winnipeg, Manitoba, and there she was once again a          doctor. Many of her patients were from the nearby timber and railway camps. Charlotte          herself operating on damaged limbs and setting          bones, in addition to delivering all the babies in the area.
But Charlotte had been practicing without a license. She had          a doctor’s license in both Montreal and Winnipeg, but was        . The Manitoba College of Physicians and Surgeons, an all-male board, wanted her to         her studies at a Canadian medical college! Charlotte refused to          her patients to spend time studying what she already knew. So in 1887, she appeared to the Manitoba Legislature to         a license to her but they, too, refused. Charlotte         to practice without a license until 1912. She died four years later at the age of 73.
In 1993, 77 years after her         , a medical license was issued to Charlotte. This decision was made by the Manitoba Legislature to honor “this courageous and pioneering woman.”

B．Unfortunately

D．applied for