Zhalong is a nature reserve in Heilongjiang in northeast China．It is one of the world's most important wetlands．The area provides food and shelter for wildlife．It is an ideal home for different kinds of plants，fish and birds．

    Many birds live comfortably in Zhalong Nature Reserve all year round，while some only stay for a short time．There are many fish in the wetlands，and the birds can easily catch them for food．Zhalong Nature Reserve is an important living area for the rare red-crowned cranes．There are not manyred-crowned cranes in the world．Some of them live in Zhalong．

    Some people want to change the wetlands to make more space for farms and buildings．This means that there will be less and less space for wildlife．

    More and more birds are in danger because they do not have enough living space．Many of them died．The Chinese government wants to protect these endangered birds，and they can be safe in Zhalong．

    Every year a lot of tourists go to Zhalong to watch birds．This year members of ourBird watching Club are going to study the different kinds of birds in Zhalongand the changes in their numbers．The study begins next month．

    We do a bird count once a year．We are now inviting secondary school students to help．We need more people to help us count and do something to help the birds．Many people do not understand the importance of the wetlands．We hope this information will help them understand and make them actively take action to protect wildlife．

真核细胞与原核细胞都具有的细胞器是

在下面横线上，填进恰当的成语。

往往讲到孤女患难，或义妇含冤的凄惨的情形，她两人便都____，泪珠尽往颊上涌流着。那时的我立在旁边瞧着，____，心里不明白她们为什么那样____地挥泪痛哭一顿。