我国药品监督管理的性质具有A．预防性 B．完善性 C．促进性 D．情报性和教育性 E

设函数f(x)＝ax²＋(b－2)x＋3(a≠0)，若不等式f(x)＞0的解集为(－1,3)．

(1)求a，b的值；

(2)若函数f(x)在x∈[m,1]上的最小值为1，求实数m的值．

句型转换。

1. This runner is from China. (改为复数形式)

    _______ _______ from China.

2. Many bananas are in the shop. (改为同义句)

    _______ _______ bananas are in the shop.

3. He has oranges, bananas and apples for lunch. (改为同义句)

    He _______ _______ for lunch.

4. Mr Clark likes some ice cream for dessert. (改为否定句)

    Mr Clark _______ _______ ice cream for dessert.

5. I have hamburgers for breakfast. (对画线部分提问)

    _______ you _______ for breakfast?

6. Zhao Jun likes eggs. (改为一般疑问句)

   _______ Zhao Jun _______ eggs?

7. She likes French fries. (改为否定句)

    She _______ _______ French fries.

8. This is a strawberry. (改为复数形式)

    _______ are _______.

9. Does Bob like bread? (作否定回答)

    No, _______ _______.

10. Jack likes ice cream very much. (对画线部分提问)

    _______ Jack _______ very much?

银柴胡的原植物属于（）

A.蓼科

B.毛茛科

C.苋科

D.十字花科

E.石竹科

卒死在心电监护仪和心电图上多表现为

A．心室颤抖

B．心室停搏

C．心房颤动

D．房室传导阻滞

E．室性自主心律

某个数据表有50个字段，现需要只显示其中5个字段，则要( )。

A．投影

B．选择

C．连接

D．删除列