脊柱骨折病人急救运送方法,下列哪种是正确的()
A.用软担架搬运
B.三人平托放于硬板搬运
C.二人抱持搬运
D.一人抱持搬运
E.一人背负搬运
参考答案:B
There _______ a clothing factory near my school, now it has changed into a supermarket. [ ]
A. used to have
B. is used to be
C. used to be
D. was used to be
散列表的结点中只包含数据元素自身的信息,不包含任何指针。