结合你的生活经验和所学的化学知识,判断下列叙述不正确的是( )
A:白菜上喷洒甲醛溶液以使白菜保鲜
B:蔬菜、水果能提供和补充多种维生素
C:铵态氮肥和草木灰(含K2CO3)不能混合使用
D:加油站严禁吸烟
阅读短文
(一)黑孩子罗伯特(节选)
“谢谢你了,好孩子!谢谢你,哦,谢谢你,孩子,你——”丽莎爸爸的喉头哽住了,他一把将罗伯特紧紧地抱在了怀里。罗伯特没想到父辈的拥抱竟是这么亲切温暖,他更没想到拥抱他的竟是丽莎的爸爸。他仿佛看见了丽莎红红的脸笑着,友好地向他伸出了双手,他禁不住低声哭了起来。
根据句意,用所给动词的适当形式填空。(1)By the time he left college, he ____ (get) much working experience because of his part-time job.(2)John, like other children who have no parents,____ (take) good care of in our country.(3)We should wash hands properly ____ (fight) against H7N9 virus.(4)Look! There are so many kites____ (fly) in the sky.(5)If you want to improve your English, you should practice____ (speak) it as much as possible in and out of class.