由直接快剪试验得到的抗剪强度线在纵坐标上的截距被称为()。 A.假想粘聚力 B.内摩

题型:单项选择题

问题:

由直接快剪试验得到的抗剪强度线在纵坐标上的截距被称为()。

A.假想粘聚力

B.内摩擦角

C.粘聚力

D.有效内摩擦角

考点:土工试验工土工试验工题库
题型:单项选择题

已学习和掌握得相当熟练的动作,不假思索即可做出的反应称为()。

A.促进反应

B.懈怠反应

C.优势反应

D.弱势反应

题型:单项选择题

世界上纪年的方法很多,下列说法中准确的一项是()。

A.现在世界上通行的是公元纪年,就是把传说中的耶稣出身年定为零年

B.我国古代的干支纪年法,是把十二天干和十地支分别相配,60年为一周期

C.南京临时政府成立后,曾用黄帝纪年,那一年为4609年

D.新中国成立后如何纪年,当时只能由新政协协商决定

题型:单项选择题

Plants are very important living things. Life could not go if there were no plants. This is because plants can make food from air, water and sunlight. Animals and man cannot make food from air, water and sunlight. Animals get their food by eating plants and other animals. So animals and man need plants in order to live. This is why we find that there are so many plants around us.

If you look carefully at the plants around you, you will find that there are two kinds of plants: flowering plants and non-flowering plants.

Flowering plants can make seeds. The seeds are protected by the fruits. Some fruits have one seed, some have two, three or four, and some have many seeds. But a few fruits have no seeds at all. An example of a fruit without seeds is the banana fruit.

Most non-flowering plants don’t grow from seeds. They grow from spores. Spores are so small and light that they can float in the air. We may say that spores are quite the same as he seeds. When these spores fall on wet and shady places, they usually grow into new plants.

小题1:The main idea of the passage is that      .

A.plants are important for life

B.plants cannot grow without air

C.there are many plants around us

D.we cannot live without water小题2:Which of the following is NOT TRUE?

A.Plants can be divided into main types: flowering plants and non-flowering plants.

B.All fruits have seeds in them.

C.Seeds are protected by the fruits.

D.Some plants grow from spores.小题3:The underlined word "non-flowering" means        .

A.开花的

B.有花的

C.多花的

D.不开花的小题4:In “shady places” there is        .

A.a lot of sunshine

B.a lot of water

C.no water

D.little sunshine

题型:单项选择题

波状云主要是由于空气大规模的系统上升运动而产生。

题型:单项选择题

新生儿生后8天,8个月早产,体重2000g,生后第3天出现黄疸,第8天最明显,精神食欲尚可,肝肋下1cm,白细胞计数正常,最可能的是

A.新生儿败血症
B.新生儿肝炎
C.新生儿生理性黄疸
D.先天性胆道闭锁
E.新生儿溶血症

更多题库