固定收入型基金的主要投资对象是国债和优先股。 ( )
参考答案:错
When they got there,they found the people suffering the storm were __________ food and water supplies.[ ]
A.in want of
B.in praise of
C.in honour of
D.in place of
千兆局域以太网帧的最短长度和最长长度分别是___1___字节。将使用波长为1310nm的单模光纤的1000Base-Lx网络升级为10000Base-LR网络时,___2___。
1()
A.46和1500
B.64和1518
C.512和1518
D.512和12144