根据短文理解，选择正确答案。

    Terrible disasters in the last 50 or 100 years have become increasingly common. Over the last 30 years, the number of weather-related disasters has increased quickly, and the disasters have also affected more people and caused more economic loss. However, much of this could be avoided through disaster risk reduction(DRR降低灾难风险).

    A meeting, held in Sendai, Japan last month, opened one day after Cyclone Pam（飓风Pam）hit Vanuatu, which struck the islands with winds of up to 340km/h and destroyed the island nation. The speech by the President of Vanuatu was given shortly after that. He begged the international community for support and stronger commitment (承诺)to helping them manage climate and disaster risks. In the face of disasters, it is always the developing countries that suffer most. Damage in these countries is often worse and unluckily, there is limited money and technique to prevent these disasters.

    In fact, we have seen Asian countries-especially those that have suffered a lot in disasters can't pay the price. Great loss Asia has suffered comes to a total of almost $ 53 billon yearly over the past 20 years.

    At the same time, studies have shown once again that proper prevention saves lives and damage. With this in mind, people at the Sendai meeting were able to come up with new agreements that effective ways of disaster risk reduction will be carried out in the coming years for those who easily get damaged in disasters.

我国居民照明电路使用的是{#blank#}1{#/blank#}（选填“交变电流”或“恒定电流”），电压为{#blank#}2{#/blank#}V（选填“220”或“380”）．

根据短文理解，选择正确答案。

    You may know the English letters A, B and C. But do you know there are people called ABC? You may like eating bananas. But did you know there is such thing as a “banana person”? How strange! Are these people from “another earth”? No. They are just Chinese people like you and me.

    ABC means American-born Chinese. An ABC is a Chinese, but was born in the United States. Sometimes, people call an ABC a “banana person”. A banana is yellow outside and white inside. So, when a person is a banana, he or she is white inside-thinking like a Westerner and yellow outside-looking like a Chinese.

    Do you know why? Usually, ABCs know little about China or the Chinese language. Some of them don't speak Chinese. Also, they are not interested in Chinese politics.

    But if ABCs cannot speak Chinese, can we still call them Chinese people? Yes, of course. They are Chinese. They are overseas (海外的) Chinese. These people may be citizens(公民) of another country like the US, Canada or Singapore. But they have Chinese blood. Their parents, grandparents or even great-grandparents were from China. They all have black eyes and black hair. But they are not Chinese citizens. They are not people of the People's Republic of China. For example, we all know the famous scientist C. N. Yang (杨振宁). He got the Nobel Prize for Physics in 1957. Chinese people love him. But he is an American citizen.