相关习题
 0  77943  77951  77957  77961  77967  77969  77973  77979  77981  77987  77993  77997  77999  78003  78009  78011  78017  78021  78023  78027  78029  78033  78035  78037  78038  78039  78041  78042  78043  78045  78047  78051  78053  78057  78059  78063  78069  78071  78077  78081  78083  78087  78093  78099  78101  78107  78111  78113  78119  78123  78129  78137  109140 

科目: 来源: 题型:

【题目】地球是人类的家园,是太阳系中一颗普通而又特殊的行星。据此回答

【1】地球是太阳系中一颗既普通又特殊的行星,其特殊性主要表现在

A.适合生物生存和繁衍

B.绕日公转与自转的方向都是自西向东

C.表面存在大气层

D.位置适中,体积和质量适中

【2】下列关于地球上存在生命物质的基本条件的叙述,不正确的是

A.充足的水分

B.恰到好处的大气厚度和大气成分

C.稳定的太阳光照和适宜的温度范围

D.地球常遭小行星撞击

【3】太阳能量来源于

A.黑子和耀斑的强烈活动 B.强劲的太阳风

C.内部物质的核聚变反应 D.放射性元素衰变产生的热能

查看答案和解析>>

科目: 来源: 题型:

【题目】GPS接收机能显示当地日出、日落的格林尼治(世界标准时间)时间。据此回答下列各题。

1

A. 06501830 B. 05501810

C. 09502010 D. 06101830

2

A. 315B. 620C. 915D. 1220

查看答案和解析>>

科目: 来源: 题型:

【题目】太阳大,地球小,太阳带着地球跑;地球大,月球小,地球带着月球跑。重温童谣,结合所学知识,完成下列各题。

【1】童谣中涉及的天体系统层次共有(

A1 B2 C3 D4

【2】童谣中出现的天体,按照先后顺序排列正确的是(

A.恒星、行星、卫星 B.星云、恒星、行星

C.行星、恒星、小行星 D.恒星、小行星、流星体

【3】It is not just a planet, It is our home.这是对地球在宇宙中地位的恰如其分的评价。地球的特殊性表现在(

A.体积是八大行星中最小的 B.质量是八大行星中最大的

C.是太阳系中唯一有生命的行星 D.既有自转运动又有绕日公转运动

查看答案和解析>>

科目: 来源: 题型:

【题目】 Can you explain _____China’s football team failed again in the attempt for the World Cup?

I am sorry, but this is the last time. We will behave ourselves.

A. why is it that B. why it is that

C. how it is that D. how is it that

查看答案和解析>>

科目: 来源: 题型:

【题目】First-class players of football must have excellent ball control, but it is not just _____ they do with their feet _____ counts.

A. how; that B. that; what

C. what; that D. whether; what

查看答案和解析>>

科目: 来源: 题型:

【题目】Research has become both simpler and more complex. It's simpler because, __【1】__ you have a computer, you can find information you need by searching the Internet. For all your information, you don't have to go to _2_ library to find the relevant resource and take notes on it. Instead, you can find some sources from the Internet _3__ print the copies needed. Remember, however, that you should usually consult different types of sources. That is, you __4__ always rely just on the Internet for your research.

While finding information is easier than ever, at the same time, researching has become _5__ complex. There is a lot more material available, which means you may be overwhelmed _6__ the amount of information. You need to learn _7_ to sort through and find the relevant information for your particular project. Also, _8__need to check the accuracy of it.

【语篇导读】随着电脑和因特网的出现,研究变得既简单又复杂。一方面,我们不必像以往一样在书中搜索资料,这为我们提供了极大的方便;另一方面,网络中众多的资料良莠不齐,选择准确的信息使我们的工作变得愈加复杂。

查看答案和解析>>

科目: 来源: 题型:

【题目】I gain a lot of rewarding experiences from some social activities. Our local Community Youth Club is a very popular organization with young people in my town. I have been a member for four years now and I’ve taken part in a lot of interesting projects, _ 【1】 include fun activities such as holiday camps and discos. We have organized sports competitions and we have even made a video.

But it isn’t all just enjoyment, we have also started doing social work to help people in our neighbourhood. We 2 (organize) activities for small children during the holidays. We have also formed a special support group to help young people stop 3 (smoke).

We are particularly proud of the most recent group we have created. It organizes regular visits 4 the local old people’s home .My class spent an afternoon at a home and everyone found the visit very rewarding. The old people there were 5 (talk) and they told us their personal stories 6 _ (cheer).During our visit, the home was filled with 7 (laugh).But we realized that life wasn’t always easy. Some of them were in poor health and were very 8 (happy).

Many young people like me do not live with our grandparents and we have little contact with elderly people. As a result, many young people don’t know 9__ they are like. After this visit, my friends and I decided that we should do _ 【10 to help improve the quality of their lives.

【语篇导读】作为社区青年俱乐部的一名成员,我参加了许多社会活动,从中获得了很多经验。

查看答案和解析>>

科目: 来源: 题型:

【题目】20126161837分我国在酒泉航天发射场用长征二F遥九火箭将搭载有景海鹏、刘旺和我国首位女航天员刘洋的神舟九号飞船送入太空运行轨道。62411时许,神舟九号飞船与天宫一号分离,1238分神舟九号飞船在航天员刘旺的操作下与天宫一号顺利实现人工操纵交会对接,125035秒完成人工对接锁紧成一体状态。根据上述材料回答问题。

1

A. 云雾 B. 太阳辐射 C. 流星 D. 太阳活动

2

A. 地球公转速度越来越快

B. 南极洲的极昼范围逐渐扩大到南极圈附近

C. 北京地区白昼变化的特点是:昼渐长——昼最长——昼渐短

D. 天安门广场上的旗杆正午时影子逐渐变短

查看答案和解析>>

科目: 来源: 题型:

【题目】Freeflyers: Modem Skydivers

Imagine falling towards the planet Earth at 【1】 awesome speed of 300 kilometers per hour. You start your fall from over four kilometers above the Earth. And you have less than one minute before you pull your parachute(降落伞)cord. You are falling 2 fast that just turning your head can send you off 3 a different direction. This is the wild side of a sport that has not found its limit—freeflying.

Freeflying 4 (base) on the more traditional skydiving, 5 of which are eye-catching. However, it is more terrifying to watch freeflyers create formations and movements. Freeflyers, 6 the name suggests, enjoy the more spontaneous(即兴的)thrill of doing their own things.

The wildest trip for a freeflyers is falling ‘head down’. Falling ‘head first’ requires a great deal of control, which means 7 (travel) not only fast but also steadily. Even the 8 (slight) movement has a great effect on your direction.

They wear the amusing jumpsuits, strange helmets and smaller parachutes. 9 (actual), their parachutes are about one quarter the size of the traditional skydiver’s parachutes. It is only in the last few years 【10 freeflying has gained any real public acceptance.

【语篇导读】本文主要介绍了一种极限运动:Freeflying。

查看答案和解析>>

科目: 来源: 题型:

【题目】The adobe dwellings(土坯房)__ 【1】__(build) by the Pueblo Indians of the American Southwest are admired by even __2__ most modern of architects and engineers. In addition to their simple beauty, what makes the adobe dwellings admirable is their __3__(able) to “air condition” a house without __4__(use)electric equipment. Walls made of adobe take in the heat from the sun on hot days and give out that heat __5_(slow)during cool nights, thus warming the house. When a new day breaks, the walls have given up their heat and are now cold enough __6__ (cool) the house during the hot day: _7_ the same time, they warm up again for the night. This cycle __8_ (go) day after day: The walls warm up during the day and cool off during the night and are thus always a timely offset(抵消) for the outside temperatures. As __9__(nature) architects, the Pueblo Indians figured out exactly __【10__ thick the adobe walls needed to be to make the cycle work on most days.

【语篇导读】相比现代化的建筑,简陋的土坯房可谓丑陋不堪。但当代的建筑师却对其情有独钟。短文主要介绍了土坯房能够调节温度的原理。

查看答案和解析>>

同步练习册答案