质量为6×103kg的四轮汽车在平直的公路上以10m/s的速度匀速行驶,在行驶过

题型:计算题

问题:

质量为6×103kg的四轮汽车在平直的公路上以10m/s的速度匀速行驶,在行驶过程中受到的阻力等于车重的0.08倍,每个轮胎与地面的接触面积为0.05m2,g取10N/kg.求:

(1)汽车所受重力的大小;

(2)汽车在1 min内通过的路程;

(3)汽车牵引力在1 min内做的功

(4)汽车静止在水平地面上时对地面的压强.

考点:重力的计算压强的大小及其计算功的计算速度公式及其应用
题型:计算题

Tony Wheeler was born to travel. His father worked for an airline. For the first 16 years of his life,Wheeler and his family lived in many different countries.

In the early 1970s,Wheeler met a young woman named Maureen. They soon married. Before getting jobs, Tony and Maureen wanted to travel. They took a year-long trip from London,through Asia,to Australia. On the trip,they visited places like India, Iran, and Afghanistan.

When Tony and Maureen arrived in Australia,people asked many questions about their trip. To answer these questions,Wheeler wrote a guidebook called Across Asia on the Cheap . The book told people about different countries' weather,customs(风俗),and places to see. But unlike travel guides in the 1970s,Wheeler’s book also talked about places most tourists did not go. He also wrote about unusual things to see and do. The book was very popular.

Wheeler and Maureen started a company called Lonely Planet. They continued travelling. They wrote guidebooks for each place they visited. Today,400 people work for Lonely Planet. The company has over 650 guidebooks. Wheeler still writes about travel “hot spots” (for example,Cambodia in Asia and Croatia in Europe). For more information,read the books!

小题1:Which trip was Tony Wheeler’s first guidebook about?

A.The United Kingdom.

B.From Asia to England.

C.From Australia to Afghanistan.

D.From England to Australia.小题2:Why did Tony Wheeler write his first guidebook?

A.He needed the money.

B.His wife asked him to do it.

C.Many people asked questions about his travels.

D.He liked writing books.小题3:How was Across Asia on the Cheap different from other travel guides?

A.It talked about places most tourists did not go .

B.It was longer and more expensive.

C.It told people about a country’s weather,customs,and places to see.

D.It was the first guidebook about Asia .小题4:Which sentence below is true?

A.Tony Wheeler still travels and writes guidebooks.

B.Tony Wheeler’s first guidebook was not popular.

C.After their first trip,Maureen did not travel with Tony .

D.Today,Lonely Planet is still a small company.

题型:计算题

读图回答问题

小题1:图中甲地位于新加坡(1°16°N,103°50′E)的

A.东北方

B.东南方

C.西北方

D.西南方小题2:该国国土面积约为

A.0.11万平方千米

B.1.1万平方千米

C.11万平方千米

D.110万平方千米小题3:若一架飞机由图中乙点起飞,沿最短航线飞往巴哈马首都拿骚(25°N,77°W),则该客机的航向为

A.一直向东

B.一直向西

C.先向东北方,再向东南方

D.先向西北方,再向西南方

题型:计算题

患者女,25岁,因“乏力、腰酸伴酱油色尿1个月”来诊。查体:贫血貌,肝、脾不大,白细胞4×109/L,红细胞2.5×1012/L,血红蛋白65g/L,血小板120×109/L,网织红细胞0.026,尿含铁血黄素染色(Rous试验)阳性。

不宜应用的治疗方法是()

A.抗凝治疗

B.输注新鲜全血

C.艾库组单抗(EculizumaB.

D.免疫抑制治疗

E.骨髓移植

题型:计算题

男性,65岁。慢性阻塞性肺疾病5年。近日受凉后发热,咳嗽加重,痰粘难咳,2天来神志欠清,发绀、躁动,入院查体双肺呼吸音低,有干湿性啰音,白细胞计数及分类增高。为明确诊治,首要检查是下列哪一项()

A.痰培养+药物敏感试验

B.胸部照片

C.血气分析

D.电解质测定

E.二氧化碳结合力测定

题型:计算题

对证券违法行为的处罚,依照国家有关证券管理的法律、行政法规执行,()《金融违法行为处罚办法》。

A、不适用

B、可选择适用

C、可参照适用

D、一般不适用

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