题目: 已知一台风机主电机转速为2985转/分,增速箱的速比是1.914,求风机转子的转速为多少?设电机的转速为n1,速比为λ,转子的转速位n2,则 答案: 参考答案:n2=n1•λ=2985×1.914转/分=5713转/分风机转子的转速为5713转/分。
题型:阅读理解 阅读理解。Title : Summer of the Monkeys by Wilson RawlsPrice : $6. 99 What's it about?A young boy, Jay, who dreams of getting enough money to buy a horse. One summer Jay finds four monkeys that have fallen off a circus cart(马戏团车). He later learns that there is a big reward(奖金) for them. However, as time goes on he makes friends with the monkeys.Title : The Catinthe Hat by Dr. SeussPrice : $8. 99 What's it about?Conrad and Sally Walden are at home alone. It is raining outside, and there is nothing to do until the cat in the hat walks into the front door...Title : Where the Wild Things Are by Mau-rice SendakPrice : $10. 77 What's it about?A disobedient (不听话的) little boy, Max, who is sent to bed without supper, makes his own world-a forest full of wild animals. That make Max as their master.Title : Bridge to Terabithia by Katherine PatersonPrice : $6. 99 What's it about?A Sth grade boy named Jesse Aaron makes friends with a girl, Leslie Burke. They invent a magical (魔幻的) place called Terabithia and they call themselves the King and the Queen.1.Which book is about the friendship between people and animals?A. Summer of the MonkeysB. The Catinthe HatC. Where the Wild Things AreD. Bridge to Terabithia2. Who is the “ King” of Terabithia?A. Jay B. Conrad C. Max D. Jess'e3. This passage may be a(n)____.A. story B. advertisementC. book D. paper 查看答案
题型:多项选择题 关于建设项目实施的监督检查,说法正确的有()A.城乡规划主管部门有权要求有关单位和人员提供与监督事项有关的文件B.可以根据需要进入现场进行勘测C.要求有关单位和人员就监督事项涉及的问题作出解释和说明D.警告并劝阻有关单位和人员停止违反有关城乡规划的法律、法规的行为E.对于违反法律规定并构成犯罪的,可依法追究刑事责任 查看答案
题型:单项选择题 患者,男,48岁,常规体检,超声检查,胰头、胰体表面光滑,回声均匀;胰尾可见1.6cm×1.6cm无回声区,包膜光滑,内透声清亮。超声提示A.肠系膜囊肿B.胰尾胰岛细胞C.胰尾真性囊肿D.胰尾假性囊肿E.胰腺囊腺瘤 查看答案