the Hudson River
the Mississippi River
the Missouri River
the transcontinental railway
第1题：
无色透明的强碱性溶液中，可能大量存在的离子组成()。
A.Na+、AlO-2，NO-3，CO2-3
B.Na+、NH+4，NO-3，Cu2+
C.K+、Mg2+，Cl-、AlO-2
D.K+、Cl-、SO2-4，HCO-3
第2题：
第3题：
5． —His Mr Brown living here?
—No，he moved_________ last week．
A． to somewhere else
B． somewhere else
C． to else somewhere
D． else somewhere
第4题：
第5题：
第6题：
In low - speed network ,it is usually adequate to wait for congestion to occur and then react to it by telling the source of packets to slow down. In high - speed networks, this approach often works poorly, because in the(71)between sending the notification and notification arriving at the source, thousands of additional(72)may arrive. In ATM network , a major tool for preventing(73)is(74)control. When a host wants a new virtual(75),it must describe the traffic to be offered and the service expected.
A．interval
B．time
C．slot
D．delay
第7题：
第8题：
You are the administrator of your company's network. An employee named Mark is leaving the company. A new employee named Eric has been hired to replace him.
Mark has a local user account on a Windows 2000 Professional computer. Mark has rights to multiple files and folders on the computer.
You want Eric to have the same rights and permissions that Mark has. You want to ensure that Mark will no longer have access to the files and folders. You want to accomplish this with least administrative effort.
What should you do?
A．Rename Mark's user account to Eric and change the account password.
B．Create Eric's account by copying Mark's profile to Eric's account. Delete Mark's account.
C．Create Eric's account by copying Marks account. Delete Mark's account.
D．Delete Mark's account. Add Eric's account. Add Eric to the same groups to which Mark belonged. Grant Eric to all the individual user rights and permissions that Mark had.
第9题：
第10题：