ISRn.信息存储和检索(综合的辅助要求)
isv.是(be的第三人称单数一般现在时)
Is it ok now ?
Is he hungry ?
Ischaemum goebeliin.圆柱鸭嘴草
Is that Lihua?
Is it durable?
issuing newspapers教育
Is it serious?
Ischaemum akonensen.屏东鸭嘴草
Is she happy ?
Is it a taxi ?