一个圆锥和一个圆柱等底等高,它们的体积一共是3.6立方米,那么圆柱的体积是___

题型:填空题

问题:

一个圆锥和一个圆柱等底等高,它们的体积一共是3.6立方米,那么圆柱的体积是______,圆锥的体积是______.

考点:圆柱的表面积圆柱的体积
题型:填空题

会导致眼压升高出现青光眼,也可能出现白内障的药物是

A.β-内酰胺类抗生素
B.氨基糖苷类抗生素
C.喹诺酮类抗菌药
D.糖皮质激素类药物
E.非甾体抗炎药

题型:填空题

司法监督

题型:填空题

阅读理解。

      In a great many cities, hundreds of people ride bikes to work every day. In New York, some bike riders

have even formed a group called Bike for a Better City. They declare that if more people rode bikes to work,

there would be fewer automobiles in the downtown part of the city and so less dirty air form car engines. For

several years, this group had been trying to get the city government to help bike riders.

     For example, they want the city to draw special lanes (车道) for bikes on some of the main streets, because when bike riders must use the same lanes as cars there are accidents. Bike for a Better City feels that if there

were special lanes, more people would use bikes.

      But no bike lanes have been drawn. Not everyone thinks it is a good idea-they say it will slow traffic. Some

store owners on the main streets don't like the idea-they say that if there is less traffic, they will have less business.

      The city government has not yet decided what to do. It wants to keep everyone happy. On weekends,

Central Park-the largest place open ground in New York- is closed to cars, and the roads may be used by bikes

only.

1. In New York, a group of bike riders ______.

A. are keeping practicing for health

B. have no cars of their own

C. are complaining there are not enough buses

D. are trying to settle the problem of air pollution

2. The bike riders suggest that _______.

A. bikes should be used instead of cars

B. bike lanes should be drawn

C. fewer buses or cars should be used

D. the number of special lanes should be decreased

3. The advantage of the special lanes is that _______.

A. they will make cars and buses run slowly

B. they will make it easier for bike riders to go to parks

C. they will make the city more beautiful

D. they will prevent accidents

题型:填空题

什么叫螺旋传动?按用途分哪几大类?

题型:填空题

某学校一个月内发生了某病的爆发,为调查病因采用爆发调查时,所使用的率应是

A.患病率
B.发病率
C.死亡率
D.病死率
E.罹患率

更多题库