对网络结点地理位置分布情况调查的主要内容包括:用户数量及分布的位置、建筑物内部结构情况,以及( )。
A.建筑物群情况B.网络应用需求C.网络用户数D.网络应用软件
参考答案:C
在△ABC中,AB=AC,∠A=36度.以点A为位似中心,把△ABC放大2倍后得△AB′C′,则∠B′等于[ ]
A.36°
B.54 °
C.72 °
D.144 °
A 58-year-old client complaining of difficulty driving at night states that the "lights bother my eyes" even though he wears corrective glasses. The nurse would suspect that the client is experiencing a deficiency in which of the following vitamins()
A. Vitamin A.
B. Vitamin B complex.
C. Vitamin E.
D. Vitamin C.