用于植物组织培养的培养液和无土栽培时所用的培养液相比，最大的

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问题单项选择题

用于植物组织培养的培养液和无土栽培时所用的培养液相比，最大的差别是（）

A.必需含植物必需的矿质元素

B.必需含有机物

C.浓度必须小于细胞液浓度

D.不一定含有植物激素

答案

参考答案：B

阅读理解

阅读短文，判断正(√)误(×)。

Hi, I'm Li Ming. I am going to have a busy weekend! On Saturday, my father is going to buy some

newspapers. My mother is going to go shopping. I'm going to visit my friend, Mike. On Sunday, my father

is going to read a magazine. My mother is going to watch TV. I'm going to the bookstore. I'm going to buy

some comic books. After that we are going to the cinema.

( ) 1. Li Ming's father is going to buy a dictionary on Saturday.

( ) 2. His mother is going to go shopping on Saturday.

( ) 3. Li Ming is going to visit his friend on Sunday.

( ) 4. His mother is going to watch TV on Sunday.

( ) 5. Li Ming is going to buy some comic books on Sunday.

问答题论述题

综合分析提高教育资源利用效率的途径？