启动真空泵时真空泵水罐液位应控制在()。A.30% B.40% C.50% D.60 发布时间:2019-07-04 20:29 │ 来源:www.tikuol.com 题型:单项选择题 问题: 启动真空泵时真空泵水罐液位应控制在()。A.30%B.40%C.50%D.60%
题型:单项选择题 What do you think of the most important inventions in the world? The TV? The printing? The telephone? Or the computer? A report shows that they are not the only important inventions. Here are three other important inventions.One of the simplest(最简单的) inventions is the toilet(冲水式马桶). Before toilets, waste ran into rivers from people’s houses. Illnesses were common in big cities, and it was often difficult to find clean drinking water.Animal food is another important invention. Before the invention, most animals were killed(杀死) every autumn because there was not enough food for them in winter. After hay (干草) became a kind of common animal food, animals could live through the long winter. The third great invention is glasses. Glasses help people read, write and do “close work” after the age of 45. Without glasses, the world would be difficult for the people above 45.InventionsSome most important inventionsThree other simple inventionsBefore the inventionsThe TVThe printingThe telephone小题1:_______The toiletWaste ran into rivers from people’s house.Illnesses were common in big cities.小题2:It was often difficult to find ___________.Hay /Animal foodPeople killed most animals in autumn because小题3:____________________________________ in winter.小题4:_______Reading, wrting and other “close work” would be difficult for the people 小题5:___________________________if there were not glasses. 查看答案
题型:单项选择题 男性,46岁,既往有高血压病史,突然出现剧烈胸痛,呈撕裂状,累及胸骨后及上腹部,伴大汗,持续1小时不缓解。查体:血压200/110mmHg(26.7/14.7kPa),心率90次/分,心(-),两肺(-),心电图:左室高电压伴V-ST段压低0.1mV。患者突然出现双下肢运动障碍,神志模糊,血压140/80mmHg(18.7/10.7kPa),心率86次/分,持续1天,之后头部CT检查无阳性发现,可能的原因为()A.脑梗死B.短暂脑缺血发作C.脑出血D.心源性脑缺血E.主动脉夹层累及颈动脉和肋间动脉 查看答案