血中还原红蛋白至少达多少时,皮肤黏膜可出现发绀()
A.>70g/L
B.>65g/L
C.>60g/L
D.>55g/L
E.>50g/L
参考答案:E
甲、乙二人分编号分别为001,002,003,…,998,999的999张纸牌,凡编号的三个数码都不大于5的纸牌都属于甲;凡编号三个数码中有一个或一个以数码大于5的纸牌都属于乙.
(1)甲分得多少张纸牌?
(2)甲分得的所有纸牌的编号之和是多少?
DOM is a platform- and language- () API that allows programs and scripts to dynamically access and update the content, structure and style of WWW documents (currently, definitions for HTML and XML documents are part of the specification). The document can be further processed and the results of that processing can be incorporated back into the presented () . DOM is a () -based API to documents, which requires the whole document to be represented in () while processing it. A simpler alternative to DOM is the event-based SAX, which can be used to process very large () documents that do not fit into the memory available for processing.
which requires the whole document to be represented in () while processing it.
A.document
B.processor
C.disc
D.memory