同时是2、3、5的倍数的数中,最小的两位数是( ),最大的两位数是( )。
30;90
--- What about the English novel?
--- It's not very difficult. There are only ________ new words in it.
A.few
B.a few
C.many
D.a little
当动车组运行途中发生哪些情形时,须启动受电弓的应急处置程序?