系统的硬件环境、软件环境和数据环境发生变化时需要对系统进行维护,这种维护属于______。
A.完善性维护
B.适应性维护
C.校正性维护
D.支持性维护
参考答案:B
《灵枢.本神》所言,肝病病症的特点有()。
A.狂妄不精
B.阴缩挛筋
C.胁骨不举
D.毛悴色夭
E.多死于秋
It's helpful to put children in a situation ________ they can see themselves differently.
A.that
B.when
C.which
D.where