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患者肝阳偏亢，肝风上扰，头痛，眩晕，失眠。应首选
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患者，男，68岁。有慢支病史10年。近半年间歇性下肢浮肿，朝轻暮重，X线提示慢支肺气肿、心脏轻度向两侧增大，ECG提示“肺型P波”，右心室肥大。诊断为肺心病伴右心衰。对其最具有诊断意义的体征是
简述受热面传热热阻的构成。
Questionsare based on the following passage:
In America Mother' s Day is celebrated on the second Sunday in May. On that day we send our mothers a special Mother' s Day card, and perhaps some flowers or candy, to show our love and appreciation for all they have done for us. Although Mother' s Day is a relatively new holiday in America, more and more other countries are also setting aside a day to honor.their mothers.
I want to tell you today how the idea of having a special day for mothers began. It all started over a hundred years ago with a woman named Anna May Jarvis.
Anna was born on May 1, 1864, just before the end of the Civil War and the assassination of President Lincoln. She was the daughter of a "minister", which in American English means a church leader. She was a quiet girl who liked to study in school, and she liked everyone and was liked by everyone as well.
After she became an adult, Anna worked for a life insurance company in Philadelphia, Penn-sylvania--a city about halfway between New York City and Washington, D. C.. Then, in 1906,just two weeks after Anna' s 42nd birthday, her mother died. It was the second Sunday in May.
In the months that followed, Anna began to change. (78)No longer was she so gentle, so relaxed and easy-going. Instead she now had just one goal for her life--to have her mother and all other mothers honored throughout the whole world on the second Sunday of May.
After more than a year of careful planning, Anna arranged the first Mother' s Day church service, on May 10, 1908, in Grafton, West Virginia. (79)The next year Anna was able to get the city of Philadelphia, where she lived and worked, to proclaim the second Sunday of Mayas an official Mother' s Day--the first city to do so. After three more years, the state of West Vir-ginia, where Anna' s mother had lived, made Mother' s Dayr.a statewide observance--not a holi-day in the normal sense, but still a day to remember what mothers have done for their children and society.
Which answer is NOT right about Mother‘ s Day？ 查看材料
简述煤粉锅炉低负荷时必须降低蒸汽压力的原因。
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