“十一五”期间我国经济与社会发展要坚持( )原则。
A．五年规划
B．三步走
C．四项基本
D．六个必须
参考答案：D
It is reported that between the year 1550 and 1950 about one kind of living things___each year .
A．died out
B．died of
C．died from
D．died down
语句“printf("a\bhow\'are\'y\\\bou\n")；”的输出结果是( )。
A．a\bhow\'are\'y\\bou
B．a\bhow\'are\'y\bou
C．how'are'you
D．ahow'are'y\bou
