双硫踪比色法测定铅时,为了防止铁、铜、锌等离子的干扰,应加入()。
A.柠檬酸铵
B.氰化钾
C.盐酸羟胺
D.以上都是
参考答案:D
Traditional network layer packet forwarding relies on the information provided by network layer()protocols, or static routing, to make an independent () decisions at each hop within the network. The forwarding () is based solely on the destination() IP address. All packets for the same destination follow the same path across the network if no other equal-cost paths exist. Whenever a router has two equal-cost () toward a destination, the packets toward the destination might take one or both of them, resulting in some degree of load sharing.
The forwarding () is based solely on the destination
A.connecting
B.window
C.decision
D.destination
温病后期,阴虚风动者,治宜选用的方剂是()
A.清骨散
B.大定风珠
C.当归六黄汤
D.青蒿鳖甲汤