小方.小米.小羽.小春四个同学都知道中国是发展中的社会主义国家,美国是发达的资本主义国家。但是,在谈到中国的社会主义制度区别于美国的资本主义制度的根本特征究竟是什么的问题时,四个同学却各执己见。你认为,关于这个问题,四个同学中,认识正确的是
One-third of the country _____ covered with trees and the majority of the citizens _____ black people.
You look so young.Haven’t you graduated from your university? Yes, I _______ in the English Department of Zhejiang Normal University for four years.
All the scientific evidence ______ that increasing use of chemicals in farming______damaging our health.
It is required that the students _____ mobile phones in their school, so seldom _____them using one.
Nuclear ______ be really dangerous at times even though it’s a nice energy in general.