目前发现的最小的细胞是()。 A.细菌 B.双线菌 C.支原体 D.立克次体 E.病

题型:单项选择题

问题:

目前发现的最小的细胞是()。

A.细菌

B.双线菌

C.支原体

D.立克次体

E.病毒

考点:自然科学知识竞赛生物知识竞赛(综合练习)生物知识竞赛(综合练习)题库
题型:单项选择题

Last Friday a storm swept through two villages in the New Territories, destroying (摧毁) fourteen homes. Seven others were so badly damaged (破坏) that their owners had to leave them, and fifteen others had broken windows or broken roofs. One person was killed, several were badly hurt and taken to hospital, and a number of other people received smaller hurt. Altogether over two hundred people were homeless after the storm.

A farmer, Mr. Tan, said that the storm began early in the morning and lasted for over an hour.

“I was eating with my wife and children,” he said, “When we heard a loud noise. A few minutes later our house fell down on top of us. We tried our best to climb out but then I saw that one of my children was missing. I went back inside and found him,

safe but very frightened.”

Mrs. Woo Mei Fong said that her husband had just left for work when she felt that her house was moving. She ran outside at once with her children.

“There was no time to take anything,” she said, “A few minutes later, the roof came down.”

Soldiers helped to take people out of the flooded (水淹的) area and the welfare department (福利机构) brought them food, clothes and shelter.

小题1:How many homes altogether (总共) were damaged in the storm?

A.Fourteen

B.Twenty-one

C.Twenty-nine

D.Thirty-six小题2:Where was Mr. Tan when the storm first began?

A.He was in bed.

B.He was inside the house.

C.He was outside the house.

D.He was on the roof.小题3: Mrs. Woo and her family didn’t get hurt because _________.

A.her husband knew there would be a storm

B.they were all outside the house when the storm became worse

C.she felt the house was moving

D.the welfare department helped her小题4: The underlined word “shelter” in this passage means ______.

A.something to eat

B.something to wear

C.somewhere to study

D.somewhere to stay小题5:Which of he following may be the best title for this passage?

A.A Terrible Storm

B.A Lucky Woman

C.Good Soldiers

D.Clever People

题型:单项选择题

2011年国际泳联世界跳水系列赛北京站女子3米板决赛中,吴敏霞以402.30分的成绩获得冠军。现假设她的质量为m,她进入水中后受到水的阻力而做减速运动,设水对她的阻力大小恒为F,那么在她减速下降高度为h的过程中,下列说法正确的是(g为当地的重力加速度)               (   )

A.她的动能减少了Fh

B.她的重力势能减少了mgh

C.她的机械能减少了(F-mg)h

D.她的机械能减少了Fh

题型:单项选择题

边坡养护与维修的要求是坡面保持()、坚实无(),其坡度符合设计规定。

题型:单项选择题

【背景资料】某建筑装饰装修工程,业主与承包商签订的施工合同协议条款约定如下:

工程概况:该工程现浇混凝土框架结构,18层,建筑面积12万m<sup>2</sup>,平面呈现U型,在平面变形处设有一道变形缝,结构工程于2008年6月28日已验收合格。

施工范围:首层到18层的公共部分,包括各层电梯厅、卫生间、首层大堂等的建筑装饰装修工程,建筑装饰装修工程建筑面积1.5万m<sup>2</sup>。

质量等级:合格。

开工日期:2008年7月6日开工,2008年12月28日竣工。

开工前,建筑工程专业建造师(担任项目经理,下同)主持编制施工组织设计时,拟定的施工方案为以变形缝为界分两个施工段施工,并制订了详细的施工质量验收计划,明确了分部(子分部)工程、分项工程的检查点。其中第三层铝合金门窗工程的检查点为2008年9月16日。

请根据上述背景资料完成以下选项。

第三层门窗工程于2008年9月16日如期完成,建筑工程专业建造师安排由资料员填写质量验收记录,项目专业质量检查员代表企业参加验收,并签署检查评定结果,项目专业质量检查员签署的检查评定结果为合格,该做法合理。

题型:单项选择题

据资料统计:在明后期至清前期200余年间,世界白银产量的一半流入中国,拥有一流城市、最为密集和完善市场网络的中国,成为当时世界经济和贸易的中心区域。然而当时它却没有形成强大的扫荡旧经济基础的革命性变化。其内在的原因在于()

A.大河流域的农耕文明不适于工商业发展

B.“重农抑商”、“海禁”与“闭关锁国”政策的影响

C.由于鸦片大量流入导致白银的大量外流

D.英国工业革命后对中国进行的商品输出

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