急性膀胱炎最常见的两种致病菌是（） A.大肠埃希菌 B.淋球菌 C.粪肠球菌 D.腐

根据句意及首字母提示，补全句中所缺的单词。

1. Those small factories are causing a lot of e ______ pollution.

2. The company sells plastic p______.

3. She always leaves the lights on and goes out. She is a w ______ woman.

4. Waste paper can be r______.

5. Did the storm do any h______ to the corn?

6. They are in great need of building m______.

7. There are many d______ between living in a big city and living in the country.

8. Food is n______ for life.

9. She bought some ______ to make some new dresses.

10. Do you use e______ for cooking?

如图所示，一木块放在水平地面上，受推力F₁=10N，F₂=2N作用，木块处于静止状态．若撤去力F₁，则木块在水平方向受到的合力为（　　）

A．10N，方向水平向左

B．6N，方向水平向右

C．2N，方向水平向左

D．零

为使施工段划分得合理，同一专业工作队在各个施工段上的劳动量应大致相等，相差幅度不宜超过( )。

A．3%～5%
B．5%～10%
C．10%～15%
D．15%～20%

他是学雷锋的老模范了，十几年来，光在路边______的螺丝钉就有三大筐。

A．信手拈来
B．顺手牵羊
C．随手捡起
D．顺虅摸瓜

我国幼教管理体制是地方负责，（）和有关部门分工负责。