【单选题】In computing, passwords are commonly used to limit access to official users. Yet the widespread use of passwords has serious drawbacks. Office workers now have to remember an average of twelve system ...
A.
They do not ensure security.
B.
They are difficult to remember.
C.
They have to be changed frequently.
D.
They limit computer accessibility.
【单选题】政府采购是指各级国家机关、事业单位和团体组织,使用财政性资金采购依法制定的集中采购目录以内的或者采购限额标准以上的货物、工程和服务的行为。下列不属于政府采购方式的是()
【多选题】What are the three types of antonyms that are commonly indentified?
A.
complementary antonyms