题目内容
I am interested in travelling. And I have visited more than ten cities in China _______.
A. last year B. a few years ago
C. in a few years D. in the past few years
阅读快车系列答案You probably don't think about soil often, but the following report may help you learn about science of soil.
What is soil made of?
Soil is made of sediments (沉积物) and humus(腐殖质). Sediment is small pieces of rock broken down over time by rain, ice, and wind. Sediment is often found in water. Humus comes from decayed(腐烂的) plants and animals. It helps give plants a lot of the food they need to grow.
How does soil form?
Over centuries, rock breaks down into very small pieces.
The rock pieces mix with humus.
The humus gets thicker and thicker over time. Soil is formed(形成)l
How are soils different?
Soils can be different colors and have different textures(质感). Texture is how the surface of an object feels. Color and texture are two features(特征) of soil.
Plants and soil
Plants do not grow well in some soils. Sandy soi1 is too dry. It does not hold water. Soil with too much clay is too thick. Most plants grow well in dark, rich garden soil that has different sediments and a lot of humus in it.
The title （标题）： 1. | |
The things in soil | Sediment is often found in water. Humus 2. decayed plants and animals. |
The steps of forming | Rock breaks down into very small pieces. The rock pieces mix with humus. The humus gets 3. . |
4. | Soils can be different colors and have different textures. |
The relationship between plants and soil | 5. is good for plants to grow in. |
选词填空,并用其适当形式填空。（8分）
let off ; keep fit ; dress up as ; be good for ; try on be different from ; be on holiday ; take a walk |
1.Her hobbies ___________ mine .
2.My cousin __________ in the USA .
3.My mother usually ________ after meals .
4.A little meat a day ______________ your health .
5.Sometimes he ________ a doctor for fun .
6.Would you like _______ the pair of shoes ?
7.Most boys enjoy ________ fireworks on the Spring festival .
8.What sports must I do to _______ ? ---swimming .