以下科学家中谁曾是光的粒子学说的支持者?()A、菲涅尔 B、牛顿 C、惠更斯 D、夫琅禾费

题型:单项选择题

问题:

以下科学家中谁曾是光的粒子学说的支持者?()

A、菲涅尔

B、牛顿

C、惠更斯

D、夫琅禾费

考点:物理学物理学题库
题型:单项选择题

直角梯形的两腰长分别为4厘米和6厘米,周长是26厘米,则梯形的面积是______平方厘米.

题型:单项选择题

阅读理解。

     When you are travelling, whether on business or for pleasure, you often need to stay in a hotel. The kind

of hotel you choose probably is decided above all according to how much money you want to spend. There

are small hotels with very few services, where the prices are low, or there are large hotels with all the very

latest comforts, where you could spend all the money you have in the bank for one very comfortable night.

     There are several different kinds of people who go to hotels. Some want to live, rather than just stay, in

a hotel; the hotels which are designed to meet their needs are called residential hotels. How- ever, most people

who stay in hotels are either business people or tourists on holiday.

     In most hotels, there are two kinds of rooms: single rooms, for the use of one person, and double rooms,

for the use of two people. In addition, in large hotels, there are also suites (套房),which include two or more

rooms connected together-perhaps a bedroom and a living room. They are for people who are very rich or

very important.

1. One's choice of a particular hotel is made mainly according to _____.

A. how much one is willing to pay for a night

B. whether one is travelling on business or for pleasure

C. whether the hotel is in the central part of a city

D. how good the services of the hotel are

2. If the president of a certain country comes, he will _____.

A. live in a new hotel with a suite

B. stay in a single room of a hotel

C. stay in a double room of a hotel

D. stay in a suite of a modern hotel

3. If a person stays in a modern hotel with latest comforts for a night, _____.

A. he will become poor

B. he has to pay a lot of money

C. he has to spend all the money he has in the bank

D. he has to pay some money

4. The title of the article is probably _____.

A. Rooms of a Hotel

B. Cost of a Hotel

C. Hotels

D. People Staying in Hotels

题型:单项选择题

根据《医疗机构药事管理暂行规定》,医院药事管理委员会委员的组成不包括下列哪方面的人员

A.药学
B.临床医学
C.医院感染管理
D.医院财务管理
E.医疗行政管理

题型:单项选择题

倒落式人字抱杆起立单根电杆时,人字抱杆的有效高度应()。

A.等于电杆高度

B.等于电杆重心高度

C.等于杆高的1.2倍

D.应不小电杆重心高的0.8倍

题型:单项选择题

造成废气锅炉过早损坏的原因是()

A.干烧法

B.水处理不当

C.柴油机燃烧不良

D.长时间燃烧

更多题库