问题 单项选择题

好氧堆肥的主要优点是:堆肥过程在控制温度、空气流通量和氧浓度的条件下进行,堆肥质量较高,能防止臭气散发和()。目前密封式堆肥一般用于污泥与城市垃圾的混合堆肥。

A.完全腐熟

B.杀灭所有微生物

C.杀灭全部病源菌

D.降低有害物质

答案

参考答案:C

阅读理解

People live all over world. They live on land that is low. They live on land that is high. Some live near the oceans. Others live far from the oceans.

Earth has many different kinds of lands. In some places, the land is flat(平坦的). Flat lands are called plains(平原).

Some parts of Earth have hills. Hills are higher than the land around them. But hills are lower than mountains. Did you ever try to ride your bicycle up a hill? Some parts of Earth touch oceans. These parts are called coasts. Some lands have water all around them. These lands are called islands.

Earth has many different bodies of water, too. You know about the oceans. There are very large bodies of water. The water in the oceans is salty. There are also smaller bodies of water called lakes. Lakes have land all around them. Rivers carry water from the land. They are long bodies of running water. The water in rivers is not salty. Most lakes do not have salty water, either.

小题1: People live on ___ lands.

A.high and salty

B.low and high

C.low and salty

D.salty and flat小题2:Hills are higher than ___ and lower than ___.

A.mountains/the land

B.mountains/lakes

C.the land/mountains

D.lakes/islands小题3:Some lands with water around them are called ___.

A.hills

B.mountains

C.flats

D.islands小题4:What’s the meaning of the word “coast”?

A.海岛

B.海岸

C.海洋

D.海滩小题5:According To(根据) the passage, which sentence is TRUE?

A.The water in rivers and lakes is salty.

B.The water in oceans and all lakes is salty.

C.The water in oceans and some lakes is salty.

D.The water in oceans and of lakes is salty.

选择题