更多"Two decades ago only spies and syst"的相关试题:
[单项选择]
Two decades ago only spies and systems administrators had to worry about passwords. But today you have to enter one even to do humdrum things like turning on your computer, downloading an album or buying a book online. No wonder many people use a single, simple password for everything.
Analysis of password databases, often stolen from websites, shows that the most common choices include "password", "123456" and "abc123". But using these, or any word that appears in a dictionary, is insecure. Even changing some letters to numbers ("e" to "3", "i" to "1" and so forth) does little to reduce the vulnerability of such passwords to an automated "dictionary attack", because these substitutions are so common. The fundamental problem is that secure passwords tend to be hard to remember, and memorable passwords tend to be insecure.
Weak passwords open the door to fraud, identity theft and breach
A. tremendous
B. little
C. common
D. obvious
[单项选择]Life used to be so simple a generation or two ago. A mother, father and their kids, all living together under one roof. But now, the (67) of the American household has changed into a web of relationships, forever changing the way families (68) their money.
The rise of divorce, remarriage and living out of wedlock (婚姻生活) have changed the family unit into an (69) network of step-relatives and (70) a series of financial challenges. More than 40% of American adults have at least one step-relative, such as a son or daughter (71) a spouse’s former relationship, in their family. Experts say that is up (72) from just 50 years ago.
These new families, often called (73) families, meld (使合并) kids from one marriage with those from another. Americans are also creating new types of households (74) starting second families later in life or adopting kids. And the trend is only (75) .Anywhere from 52% to 62% of a
