【单选题】先随机选择一些被访者并对其实施访问,再请他们提供另外一些属于所研究目标总体的调查对象,根据所形成的线索选择此后的调查对象,这是一种( )。
【单选题】Although _____ Manga (日本漫画)can be very interesting, we need to remember that _____ other kinds of things is necessary.
【简答题】阅读理解。 1. We can know from the first two ads that . A. to be a sourcing assistant, you need to be very persuasive B. RHK Design deals with business from European countries C. to work for RHK Design, yo...
【简答题】柱塞式液压缸是( )式液压缸,液压油进入油缸时,推动柱塞带东运动部件移动,但( )退回时必须靠其他外力或自重来驱动。
【简答题】根据句意和首字母填写单词。 1. The girl is very o_____. 2. We need to be more c_____. 3. I'd tell him to ask my p_____ before he borrows something next time. 4. I'd wait for him to i_____ himself to me. 5. I enjoy ...
【单选题】At a time of this economic crisis, our _____ should be very clear about what we need to do.