教育的最基本途径是( )。A．教学 B．课外活动 C．社会实践 D．校外活动

根据句意及首字母完成单词。

1. Black, red, green are all c             .

2. S             _ is the first day of a week.

3. We have m_______ sports clubs, come to join us!

4. He is my uncle's son, so I call him ________ (堂兄).

5. You need to write down something on your ________ (笔记本) every day.

6. I n________ some help. Can you help me?

7. My m________ book is on the desk and the English book is in the bag.

8. Kate's bag is on the f________, under my bed.

9. These boys are my f________.

10.Please t________ some things to your sister's school.

Later in this chapter cases will be introduced to readers ____ consumer complaints have

resulted in changes in the law.    [ ]

A. which

B. when

C. who

D. where

下列说法正确的是

A．最外层电子排布为ns²的元素一定处于周期表IIA族

B．主族元素X、Y能形成型化合物，则X与Y 的原子序数之差可能为2或5

C．氯化氢的沸点比氟化氢的沸点高

D．同主族元素形成的氧化物的晶体类型均相同

尾矿不准随意排放的原因是（）

A.金属尾矿本身有辐射性

B.洗选液有污染

C.避免尾矿占用大量土地

D.尾矿中可能残留有价值矿物

E.集中矿块便于检取

2014年成都养老保险缴费比例是多少？其缴费基数最低为多少？