人类生存需要清洁的空气。下列情况不会造成环境污染的是 [ ]
A.燃放烟花
B.汽车尾气
C.煤炭燃烧
D.光合作用
答案:D
阅读短文,用括号内所给词的适当形式填空。
Cheng Long is a famous action star of Hong Kong. He took part in the fourth Chinese Children's Charity
Day. At the meeting he also 1 (give) his collection of World Leaders Stamps to the China Children and
Teenagers' Fund (少年基金会). He 2 (say) everyone should show their love to poor children. On June 22,
2005 in Beijing, Cheng Long 3 (invite) to have an important meeting by the Charity. The Charity 4 (collect)
money for poor children. Because the children 5 (leave) their schools already. The Charity wants to help
them return to their schools again.
根据热水采暖方式的特点,适合这种采暖方式的建筑类型是()
A.医院
B.宾馆
C.会堂
D.幼儿园