阳光下,一株绿色植物所能进行的生理活动有 [ ] A.吸收作用、光合作用和呼吸作

题型:选择题

问题:

阳光下,一株绿色植物所能进行的生理活动有 [ ]

A.吸收作用、光合作用和呼吸作用

B.吸收作用、光合作用和蒸腾作用

C.吸收作用、呼吸作用和蒸腾作用

D.吸收作用、光合作用、呼吸作用和蒸腾作用

考点:呼吸作用蒸腾作用光合作用
题型:选择题

影响土地价格一般因素的社会因素主要指一些能够对地价的变动有一定影响的诸如()等方面的情况。

A.文化与习惯

B.人口状况

C.社会体制

D.社会发展阶段

E.经济调节指标

题型:选择题

People have been painting pictures for at least 30,000 years. The earliest pictures were painted by people who hun­ted animals. They used to paint pictures of the animals they wanted to catch and kill. Pictures of this kind have been found on the walls of caves in France and Spain. No one knows why they were painted there. Perhaps the painters thought that their pictures would help them to catch these animals. Or per­haps human beings have always wanted to tell stories accord­ing to pictures.

About 5,000 years ago the Egyptians and other people in the Near East began to use pictures as a kind of writing. They drew simple pictures or signs to represent things and ideas, and also to represent the sounds of their language. The signs these people used became a kind of alphabet(字母表).

The Egyptians used to record information and to tell sto­ries by putting picture-writing and pictures together. When an important person died, scenes and stories from his life were painted and carved on the walls of the place where he was bur­ied. Some of these pictures are like modem comic-strip sto­ries. It has been said that Egypt is the home of the comic-strip. But, for the Egyptians, pictures still had magic power. So they did not try to make their way of writing simple. The ordinary people could not understand it.  

By the year 1,000 BC, people who lived in the area a-round the Mediterranean Sea had developed a simpler system of writing. The signs they used were very easy to write, and there were fewer of them than in the Egyptian system. This was because each sign, or letter, represented only one sound in their language. The Greeks developed this system and formed the letters of the Greek alphabet. The Romans copied the idea, and the Roman alphabet is now used all over the world.

These days we can write down a story, or record informa­tion, without using pictures. But we still need pictures of all kinds: drawings, photographs, signs and diagrams. We find them everywhere: in books and newspapers, in the streets, and on the walls of the places where we live and work. Pic­tures help us to understand and remember things more easily, and they can make a story much more interesting.

6. Pictures of animals were painted on the walls of caves in France and Spain because ________.

A. the hunters wanted to see the pictures  B. the painters were animal lovers

C. the painters wanted to show imagination D. the pictures were thought to be helpful

7.The Greek alphabet was simpler than the Egyptian system for all the following reasons EXCEPT that ________.  

A. the former was easy to write        B. there were fewer signs in the former

C. the former was easy to pronounce    D. each sign stood for only one sound

8. Which of the following statements is TRUE?

A. The Egyptian signs later became a particular alphabet.

B. The Egyptians liked to write comic-strip stories.

C. The Roman alphabet was developed from the Egyptian one.

D. The Greeks copied their writing system from the Egyp­tians.

9. In the last paragraph, the author thinks that pictures __________.

A. should be made comprehensible        B. should be made interesting

C. are of much use in our life            D. are disappearing from our life

题型:选择题

在windows中,属于控制面板的查看方式的是()。

A.分组

B.类别

C.大图标

D.小图标

题型:选择题

某砌体承重结构,底层砖墙370mm厚,采用钢筋混凝土条形基础。地质条件如下:地面下3.5m厚黏土层,物理性质指标:γ=18.6kN/m,ωL-=39.4%,ωp=23.2%,ω=26.6%,ds=2.70,Es=6.9MPa,fak=200kPa。其下为淤泥质土层,物理性质指标为:ω=52%,Es=2.3MPa,fak=76kPa。

上部结构荷载效应为:

正常使用极限状态下的荷载效应的标准组合:Fk=210kN/m,Mk=40kN·m

承载能力极限状态下的荷载效应的基本组合:Fk=235kN/m,Mk=55kN·m

试设计该基础(基础底面埋深可取2.0m,基础混凝土强度等级C20;100厚混凝土垫层C10;混凝土轴心抗拉设计强度ft=1.1N/mm2;钢筋采用HPB235,钢筋强度设计值:fy=210N/mm2)。

若基础宽度b=1.8m,在最大基底压力一侧,基底边缘最大净反力Pjmax=256kPa,在墙边缘基底净反力Pj=125kPa。计算该基础底板承受的最大弯矩最接近()。

A.54.3kN·m

B.86.5kN·m

C 106.5kN·m

D.148.3kN·m

题型:选择题

企业维持原有地位,以现有的不变的产品和市场防御竞争者的攻击,这种市场防御策略是()。

A.阵地防御

B.侧翼防御

C.运动防御

D.收缩防御

更多题库