在《红楼梦》第九十回中，贾母说：“自然先给宝玉娶了亲，然后给林丫头说人家。再没有

Having arrived at the railway station, ______.

A．it was found that the train had left

B．the train had left

C．the train was found left

D．he found that the train had left

下列选项中不属于应用软件的是（）。

A.Word

B.Photoshop

C.DOS

D.Netants

下列那一个指令可以开设空目录？（）

A.mk

B.Dir

C.Rmdir

D.mkdir

The network layer provides services to the transport layer．It can be based on either (71) ．In both cases，its main job is (72) packets from the source to the destination．
In network layer，subnets can easily become congested，increasing the delay and (73) .
for packets．Network designers attempt to avoid congestion by proper design．Techniques include (74) policy，caching，flowcontrol，and more．
The next step beyond just dealing with congestion is to actually try to achieve a promised quality of service．The methods that can be used for this include buffering at the client，traffic shaping，resource (75) ，and admission control．Approaches that have been designed for good quality of service include integrated services(including RSVP) ，differentiated services， and MPLS．

A．dealing with
B．routing
C．sending
D．receiving

卫生行政部门及其工作人员正确的做法是：（）

A.对符合条件的设置及执业登记申请不予受理的

B.对不符合条件申请者准予许可或者超越法定职权作出准予许可决定；

C.按规定的程序审查而使符合条件的申请者得到许可；

D.对符合条件的申请不在法定期限内作出许可决定的。