字母抄写。

①Kk

____

②Ll

____

③Mm

____

④Nn

____

我们在打开饮料瓶时可看到瓶口冒出大量泡沫，哪冒出的气体是不是二氧化碳呢？有同学提出用澄清石灰水来检验．就这一过程而言，属于科学探究中的（　　）

首先，从一株阔叶植物上，剪下大体相同的两个枝条，将一个枝条插入A试管中，将另一枝条上叶片全部剪去，并在切口处涂上凡士林后插入B试管中。在两个相同试管中加入等量的清水，并在水面上滴少许植物油，然后，用透明塑料袋分别套在两个试管上，扎紧塑料袋口。(见下图)

将上述A.B两套装置同时放在有阳光、温暖的相同地方，数小时后，观察发生的实验现象。

认真阅读以上实验方案，并回答以下问题：

Useful Information in Australia
Useful Numbers
All the telephone numbers are useful and free.
。Fire/ Police/ Ambulance(救护车)—000     Telephone information—12455
。Medical(医学的) Care—1300369359       Taxi—1800421113
Surfing the Internet
With so many Internet tearooms and public libraries, it's easy to surf the Internet in Australia.
Also it’s very cheap for you to surf the Internet.
。Public libraries offer free Internet every day even during public holidays.
。Many travel managers provide connection which is cheap or free.
Post Service
All post offices around the country offer post services(服务) so you can receive mails as you travel around the whole country.
。Post offices are usually open from Monday to Friday from 9 am to 5 pm.
。It costs 50 cents to send a standard（标准的） letter in Australia.
Public Holidays
On public holidays all shops are closed across Australia, so are banks and post offices.
。New Year's Day—1st January
。Australia Day—26th January
。Christmas Day—25th December