金属的腐蚀产物主要是（）。 A.金属氧化物 B.金属氯化物 C.盐类 D.氢氧化物

Skin Diving     Interesting & Useful

Skin-diving, a new sport today, takes you into a wonderful new world! It is like a visit to the moon!

When under water, it is easy for you to climb big rocks because you are no longer heavy, much lighter than on land!

Here, under water, everything is green and blue. During the day, there is plenty of light. When fish swim nearby, you can catch them with your hands!

With a tank of air on your back, you can stay in deep water for a long time, but you must be careful when you dive in deep water.

To catch fish is one of the most interesting parts of the sports. Besides, there’re more uses for skin diving. You can clean and repair ships without taking them out of water. You can get many things from the deep sea.

小题1: The underlined sentence “takes you into a wonderful new world” in the first paragraph means ____________.

A．the moon is a wonderful place to visit.

B．climbing big rocks under water is wonderful.

C．skin-diving is a wonderful way for traveling.

D．you can see many things you’ve never seen and enjoy yourself.小题2:With a tank of air on your back, you can _______.

A．swim like a fish

B．have more fun

C．go deeper under water and stay longer

D．catch fish more easily小题3:What does the last paragraph mainly tell us?

A．Skin diving is a new sport today.

B．Skin diving is interesting as well as useful.

C．How to catch fish.

D．What you can see under water.小题4:We can probably find this article in a ________.

A．newspaper

B．text book

C．sport magazine

D．guidebook小题5:Which of the following is Not True about skin-diving according to the passage?

A．You feel lighter when you go under water.

B．You can clean and fix ships without taking them out of water at skin diving.

C．There’s enough light under water all the time.

D．You can see fish and catch them at skin-diving.

《中国财经报》报道，由上海市环保局倡导的“绿色饭店”在上海悄然兴起。所谓“绿色饭店”，就是运用环保、健康、安全的理念，“倡导绿色消费，抵制食物浪费”。“倡导绿色消费”的主旨（    ）

A．消除人与自然环境的矛盾

B．提高我国居民的生活水平

C．优化和改善我国居民的消费结构

D．保护消费者健康和节约资源

盐的水溶液是否都呈中性呢？小松在老师的合作下进行了探究。

【实验试剂】10%的Na₂CO₃溶液、10%的Na₂SO₄溶液、10%的CuSO₄溶液、蒸馏水、pH试纸

【信息资料】Na₂CO₃ 、Na₂SO₄和CuSO₄固体溶于水分别会解离出Na⁺ 与CO₃^2－、Na⁺与SO₄^2－、Cu²⁺与SO₄^2－

【实验记录】 

【结论】不同的盐溶于水形成的溶液，有呈中性、碱性或________性。

【推理】Na₂CO₃溶液呈碱性的原因除了与水有关外，还与该盐中的 ________（填离子符号，下同）有关，而CuSO₄溶液呈酸性的原因除了与水有关外，还与该盐中的 __________有关。

【反思与评价】小松在上述实验探究中，采用了实验___________的方法。

全年三大流星雨指（）

A、元月象限仪、八月英仙、十二月双子

B、五月宝瓶、十月猎户、十二月小熊

C、九月御夫、六月天琴、十一月金牛

某企业与开户银行有多种借款业务，以下是借款合同协议中的相关条款：在正式协议下约定企业的信用额度为100万元；年内企业未使用部分的余额企业需向银行支付承诺费，承诺费率为0.5%，企业在银行中保持按贷款限额15%计算的最低存款金额；贷款期内企业需按月等额偿还贷款。

长期借款的偿还方式包括( )。

A．定期付息，到期一次还本

B．定期还本，到期一次付息

C．到期一次还本付息

D．每期偿还小额本金和利息，到期偿还大额本金

E．定期等额偿还本利