某用户的电子邮件地址是jinlei@taoo.cn,那他发送邮件的服务器是()
A.jinlei
B.www.taoo.cn
C.internet
D.taoo.cn
参考答案:D
We must apply what we have learned to our daily work because in no case _____ from practice.
A.should theory separate
B.should theory be separated
C.theory should separate
D.theory should be separated
()是急性阑尾炎最常见的重要体征。