中央银行是银行的银行,它集中管理商业银行的().
A.库存现金
B.存款准备金
C.股票
D.债券
参考答案：B
在重整反应中一反进行的主要是（）反应。
A.六员环烷烃脱氢
B.五员环烷异构脱氢
C.烷烃脱氢环化
D.烷烃异构化
Being a parent is not always easy, and being the parent of a child with special needs often carries with
_______ extra stress.[ ]
A. it
B. them
C. one
D. him
