已知x1和x2是关于x的方程x2-2（m+1）x+m2+3=0的两实数根，x21 发布时间：2017-04-27 01:18 │ 来源：www.tikuol.com 题型：选择题 问题： 已知x1和x2是关于x的方程x2-2（m+1）x+m2+3=0的两实数根，x21+x22=22，则m的值是（ ）A．-6或2B．2C．-2D．6或-2
题型：选择题 76． (1) is a channel’s capacity which directly reflects the data transfer rate of the channe1. (2) functions in a NetWare network which is used to define addressing schemes. (3) is a network layer device that supports multiple LAN interfaces and segments LANs into smaller collision and broadcast domains. (4) is the popular LAN developed under the direction of the IEEE802.3. (5) is a device which enables digital microcomputers to communicate across analog telephone lines.(1)A．The volumeB．The bandwidthC．The noiseD．The delay 查看答案
题型：选择题 关于注射用无菌分装产品的叙述，正确的是A．分装须在一般无菌工作区进行B．无菌药物粉末常用灭菌溶剂法或高温干燥法精制而得C．分装室相对湿度应控制在分装产品的临界相对湿度以上D．分装室的温度常在15℃以下E．分装需在100级洁净环境中 查看答案