诗经卷耳采采卷耳的采采不能认为是非一采，为什么？举例说明。

将紫色水萝卜的块根切成小块放入清水中，水的颜色无明显变化，若进行加温，随着水温的增高，水的颜色逐渐变红，其原因是[ ]

A．细胞壁在加温中受到破坏

B．水温增高，花青素的溶解度加大

C．加温使生物膜失去了选择透过性

D．加温使水中化学物质发生了反应

任务型阅读

     Do you know the benefits(好处)of potatoes? It is   1   the king of all vegetables and all foods.

       2  , potatoes were first grown in Africa. Africa is the hometown of potatoes. Later, potatoes were grown all over the

world. First, people only ate them uncooked.   3  , people learnt to cook them delicious.

     Now potatoes have become delicious food or cooked vegetables on the table. Men and women, young and old, enjoy

eating them very much. It is said potatoes can be cooked into 400 kinds of cooked vegetables.

     In the past, some people thought they could make people fat and were afraid of eating them too much. 5.But in fact,

they don't make people fat but keep people thin.4.So you can enjoy them __________if you like.

1.选词填空。___________

A. nearly

B. nearby

C. never

2.把下面的句子放在文中正确的位置，并将其序写写在下面的横线上。_______

A. As the time passed

B. As we know

3.Potatoes can be made into _______ _______ _______vegetables according to the passage.（每空一词）

4.根据汉语提示完成句子。（每空一词）

So you can enjoy them _______ _______ _______ _______（尽可能经常地）if you like.

5.把划线部分翻译成汉语。

   ____________________________

计算题：一台起重机主起升机构起升速度30m/min，减速机速比40.17，卷筒直径650mm，钢丝绳分支数8，求电动机额定转速？

债务人因债权人变更住所没有通知自己而致使履行债务发生困难的，债务人可以采取的措施包括( )。

A．中止履行

B．将标的物提存

C．终止履行

D．向法院起诉

E．将标的物抛弃

— What are those in English?

— ______ are desks.

A. They              B.These         C.Those