【单选题】On no account can parents always _______ with the children, otherwise they will become more greedy and come up with more unreasonable requests.
【单选题】Causes of megaloblastic anemia:
A.
deficiency of vitamin B12
B.
deficiency of vitamin B6
C.
deficiency of vitamin B1
【简答题】虚拟设备是通过【】 技术,把独享设备变成能为若干用户共享的设备。
【简答题】虚拟设备是通过虚拟技术把 设备变成能为若干用户 的设备。
【单选题】If the duke has no children, who will the title? [ ]