The efficiency and effectiveness是单数还是负数
The bookstore and the cinema 是单数还是复数?为什么?
the staff of the company 用单数还是负数?
以两个特殊疑问词开头的句子是属于单数还是负数,比如where and where ——,
of后的名词是单数还是负数取决于什么?
every student 是单数还是负数?each student呢
None和Neither后的谓语是单数还是负数?
sb's and sb's 与sb and sb's的区别,他们的谓语动词分别是单数还是负数?
A and B是单数还是复数
英语翻译Ensuring AA afford the equivalent quality and efficiency
Of particular interest are the efficiency and scalability of
英语翻译An Describe the difference between efficiency and effect
英语翻译Fig.1 presents the removal efficiency and recovery time