电子商务技术支持的4 个层次中, ( ) 能够提供格式化数据交流和非格式化数据交流两种交流方式。
A.网络层
B.多媒体信息发布层
C.报文和信息传播层
D.贸易服务层
参考答案:C
关于回转交易,下列说法错误的是()。
A.目前,我国证券交易所的所有交易品种都不可以进行回转交易
B.回转交易是指当日买入的证券,经确认成交后,在交收之前卖出的交易
C.目前,在我国证券交易所交易品种中,债券、权证和B股都可以进行回转交易
D.目前,在我国证券交易所的交易品种中,权证实行T+0回转交易
When preparing to give a child with insulin-dependent diabetes his dose of regular and NPH humulin insulin, which of the following actions would be most appropriate
A.Taking the premixed insulin out of the refrigerator, then withdrawing the amount into in one syringe.
B.Using two syringes, one for each type of insulin, and giving two injections.
C.Withdrawing the NPH insulin first, then withdrawing the regular insulin into one syringe.
D.Withdrawing the regular insulin first, then withdrawing the NPH insulin into one syringe.