选用直接行为观察法进行社区护理评价的缺点和不足表现在()
A.获得资料可信度差
B.可信度较高
C.消耗时间较多
D.观察者容易出现错误理解
E.灵活性差
参考答案:C
一种商品,先降价20%,再涨价20%,现价与原价一样.______.(判断对错)
There are five people in the room, but I know _____.
A.both of them
B.none of them
C.all of them
D.neither of them