后备猪的饲喂方法,前期宜采用(),后期则宜采用()。

题型:填空题

问题:

后备猪的饲喂方法,前期宜采用(),后期则宜采用()。

考点:畜牧、兽医科学畜牧生产学畜牧生产学题库
题型:填空题

阅读理解       

        Johnson likes swimming in a small river near his house. But then his father goes to work in a big city

and Johnson goes with his family. Their new house has a garden, but the garden is very small. Johnson is

not very happy. 

       "Is there a river near the house?" he asks his father on the first morning ." No, there isn't . But there is a big park near here. And there's a pool in it.  "We are going there this afternoon." says his father. Johnson is happy. 

       Johnson and his father go to the park in the afternoon. Johnson wants to walk near the pool. But he

sees a sign. His father reads it to him: "Warning(警告) This pool is dangerous.362 people fell(掉) into it.

"Johnson looks into the pool carefully, then he says ,"I can't see them. "

1. There is a _______ near Johnson's new house.

A. small river  

B. big park  

C. big bank  

D. big post office

2. John isn't very happy because __________.

A. There isn't a big park

B. There isn't a river near the new house.

C. his father goes to work in a big city

D. There's a pool.

3. There is a _______ near the pool.

A. sign

B. river

C. garden

D. tree

4. The warning tells people ________ near the pool.

A. to look into it

B. not to go to the park  

C. to be careful

D. not to look into it

5. Which isn't right?

A. There isn't a small river near Johnson's house.

B. Johnson's father gets a new job in a big city.

C. Johnson is afraid to walk near the pool

D. Johnson goes to the big city with his father.

题型:填空题

解方程:3(x-5)2=2(5-x)

题型:填空题

画出适当的镜子,使光线能够发生图示现象。

题型:填空题

初步可行性研究阶段投资估算的允许误差率为( )。

A.大于±30%

B.±30%以内

C.±20%以内

D.±10%以内

题型:填空题

在硫酸铜溶液中加入一定量的锌粉和铁粉充分反应后,过滤可得到一些固体.向该固体中加入少量稀硫酸,可观察到有气体产生.下列对该固体的叙述正确的是(  )

①一定有锌、②一定有铁、③一定有铜、④可能有锌、⑤可能有铁、⑥可能有铜.

A.①、②、③

B.②、③、④

C.③、④、⑤

D.①、②、⑥

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