起重机和土拔杆的主要组成部分是(),它可以省力也可以改变用力的方向。A.千斤顶 B.

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问题:

起重机和土拔杆的主要组成部分是(),它可以省力也可以改变用力的方向。

A.千斤顶

B.滑车

C.卷扬机

D.撬杠

考点:建设工程技术与计量(安装工程)第三节吊装工程第三节吊装工程题库
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简述战略业务单位价值链的构成。(6分)

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Have you ever heard of Paynes Prairie(大草原)? It is one of the most important natural and historical areas in Florida. Paynes Prairie is located near Gainesville. It is large, 21,000 acres. This protected land is called a reserve, which is managed by the Florida Park Service.

The Paynes Prairie basin was formed when limestone(石灰石)broke down and the ground settled. It is covered by wet prairie plants. There are areas of open water. During brief periods it was flooded enough to be considered a lake. Except for that, the basin has changed little through time.

Man has lived on Paynes Prairie a very long time. He lived there as far back as 10,000 B.C.. At one time, the Seminoles lived there. The prairie is thought to have been named after King Payne, a Seminole chief. During the late 1600s, the largest farm where cattle are fed in Florida was on Paynes.

William Bartram who lived 200 years ago visited Paynes Praire in 1774. Bartram was the first person who described nature through personal experiences as well as scientific observations. At that time he called Paynes Prairie the “great Alachua Savannah". Most of the animal life, which Bartram described, is still here. A large number of animals live here in winter. The variety of animals is increased by the presence of pine flat woods, wetlands and ponds.

The Paynes Prairie Reserve State Park is open all year round. The Florida Park Service works hard so that the park will appear as it did in the past. It offers many opportunities for entertainment. In the park you can camp and picnic. You can hike and bike. You can boat and fish. You can ride on horses. And you can see Florida as it was in the early days.

小题1:The second paragraph is mainly about   _______.

A.how the present Paynes Prairie basin came into being

B.what the present Paynes Prairie basin is covered by

C.why the present Paynes Prairie basin is unchanged

D.when the present Paynes Prairie basin began to exist小题2:All of the following statements are true EXCEPT that _______

A.the Florida Park Service manages Paynes Prairie

B.you can have fun in the Paynes Prairie Reserve State Park

C.there used to be a big cattle farm on Paynes Prairie

D.William Bartram was the first person to visit Paynes prairie小题3:The purpose of the passage is to _______.

A.call on people to protect wildlife of Paynes Prairie

B.introduce Paynes Prairie to people

C.tell people the recorded history of Paynes Prairie

D.attract people to visit Paynes Prairie小题4:What will the writer most probably talk about in the paragraph that follows?

A.The effect of tourism on Paynes Prairie.

B.The history and present of Florida.

C.The natural resources of Florida.

D.The future development of Paynes Prairie.

题型:单项选择题

汉斯·希伯同志是哪国人?出生于哪国?

题型:单项选择题

车辆前轮胎爆裂,危险较大,方向会立刻向爆胎车轮一侧跑偏,直接影响驾驶人对转向盘的控制。

题型:单项选择题

患者男性,72岁,抽烟48年,30支/日。发生无痛、间歇、肉眼血尿1周,尿中有血凝块,来院就医。体检:全身情况良好,未发现异常体征。

该病人健康史中与疾病相关的因素是

A.饮酒
B.喜食动物内脏
C.喜饮矿泉水
D.吸烟
E.高龄男性

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