植物吸收水和无机盐的主要部位是根尖根尖的结构从上到下依次包括成熟区、伸长区、分生

货币的基本职能有哪些？        （需要   的货币，标个价）和      （需要支付    的货币）：

属于枕左前位分娩机制的项目，正确的是（）

A.下降动作呈持续性

B.进入骨盆入口时，胎头呈俯屈状态

C.俯屈动作完成后，胎头以枕额径通过产道

D.胎头颅骨最低点达骨盆最大平面时，出现内旋转

E.内旋转动作完成于第一产程末期

将下列两个简单句合并成一个含有非限制性定语从句的复合句。

1. I am reading Harry Porter. It is an interesting book. → 

   ____________________________________________

2. He failed in the exam. It made his parents very angry. →

   ____________________________________________

3. He has two sons. Both of them are doctors. →

   ____________________________________________

4. Recently I bought an ancient Chinese vase. The price of it was very reasonable. →

   ____________________________________________

5. Last week, two persons came to see the house. Neither of them wanted to buy it.→

   ____________________________________________

6. I have lost the pen. My father bought it for my sixteenth birthday. →

   ____________________________________________

7. Do you see the house? The windows of it face south.→

   ____________________________________________

8. He must be from Africa. It can be seen from his skin.→

   ____________________________________________

9. The book is worth reading. He paid 6 yuan for it. →

   ____________________________________________

10. She is a teacher of much knowledge. Much can be learned from her. →

   ____________________________________________

富气量过大，吸收剂量小，故（）比小，吸收效果（）。

与北宋并存的少数民族 * * 有（）

A.辽

B.金

C.元

D.西夏