题型:任务型阅读 题类:真题 难易度:普通
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): | |
The things in soil | Sediment is often found in water. Humus decayed plants and animals. |
The steps of forming | Rock breaks down into very small pieces. The rock pieces mix with humus. The humus gets . |
| Soils can be different colors and have different textures. |
The relationship between plants and soil | is good for plants to grow in. |
{#blank#}1{#/blank#}Vitamin A What can high-vitamin A foods do for you? be great for night vision help you see in color help your grow properly and aids in healthy skin ﹡ Vitamin A in carrots helps you see at night | |
{#blank#}2{#/blank#}The B vitamins What can the B vitamin do for you? help make energy and set it free help make red blood cells which carry oxygen(氧气) throughout your body ﹡ The B vitamins in leafy green vegetables help your body make protein(蛋白质)and energy. | |
{#blank#}3{#/blank#}Vitamin C What can vitamin C do for you? keep body tissues(组织) in good shape help you heal when you get hurt help your body resist infection ﹡ Vitamin C in oranges helps your body heal if you get a cut | |
{#blank#}4{#/blank#}Vitamin D What can vitamin D do for you? help keep your bones strong and healthy help keep your teeth strong and healthy help your body absorb the amount of calcium(钙) ﹡ Vitamin D in milk helps your bones and teeth. | |
{#blank#}5{#/blank#}Vitamin E What can vitamin E do for you? protect your skin from ultraviolet(紫外线) light protect your lungs from becoming damaged by polluted air help make red blood cells ﹡ Sunflowers seeds are the richest in Vitamin E |
A. Emily often feels tired and seems to be lack of energy.
B. Jeff spent his summer vacation on the beach and got serious sun-burnt.
C. Linda feel nervous before the new people.
D. Tony sometimes feels pains in his bones and he has loose teeth.
E. Kate has poor eyesight and she can't see clearly at night.
F. Luke is so careless that he often gets hurt. And it takes a long time for his wound(伤口) to heal.
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