问题 多项选择题

下列物体中,能视为质点的是()

A.计算从北京开往广州的途中火车与广州距离时的火车

B.研究航天飞机相对地球的飞行周期时,绕地球飞行的航天飞机

C.研究前进中汽车车轮的转动

D.沿地面翻滚前进的体操运动员

答案

参考答案:A, B

解析:当物体的形状大小对我们所研究的问题影响不大可以忽略时,就可以将物体看做一个有质量的点,即质点,当计算从北京开往广州的途中火车与广州距离时火车的长度相对于北京到广州的距离来说可以忽略,所以能将火车看做质点,A正确,当研究航天飞机相对地球的飞行周期时,航天飞机的形状和大小属于次要因素,可以看做质点,B正确,当研究前进中汽车车轮的转动时,车轮的形状对我们所研究的问题有很大的影响,所以不能看做质点,C错误,当研究沿地面翻滚前进的体操运动员时,运动员的形态大小不能忽略,所以不能看做质点,D错误,

判断题
填空题

A Accommodation 住宿

One is never at a loss for a place to (1) in Malaysia.The country’s cities and major towns have a (2)  range of accommodation to suit all tastes and budgets. Most international (3)  hotels cater to total living requirements and as such, one (4) easily find restaurants, entertainment outlets and fitness centres within the (5)  complex.

Several resort hotels even have adjoining golf courses and (6)  parks with special privileges accorded to hotel guests. Family outings (7)  these hotels can be a practical yet fun-filled activity. Guests (8)  on longer stays may appreciate the serviced apartments situated within (9)  major cities.

Malaysia is also an excellent destination for romantic getaways, (10)  for honeymooners seeking an idyllic tropical retreat with (11) amenities. The country’s award-winning island resorts are paradises waiting to be (12)

For budget-conscious tourists, there is an array of accommodations located (13)  to amenities and tourist attractions. Budget accommodations in Malaysia are (14)  according to the Orchid Classification Scheme and include hostels, bed (15)  breakfast establishments, inns, boarding houses, rest houses and lodging houses (16)  Orchid rating is awarded to tourist accommodations offering basic facilities (17)  well as safe and clean premises.

Adventurous souls can try (18)  the innumerable value-for-money kampung-style chalets located along popular beaches. Nature (19)  seeking communion with nature in Malaysia’s world-famous nature parks such (20) Taman Negara will be amazed by the easy availability of chalets with modern facilities in these areas.

14.()