对于缠绵不愈的腹痛，应加入（）之剂，尤为必要. A.辛温通阳 B.辛温发散 C.辛凉

下列实验方法正确的是（　　）

A．用嘴吹灭酒精灯火焰

B．将氢氧化钠固体直接放在托盘天平的托盘上称量

C．用燃烧的方法区别羊毛和涤纶

D．将pH试纸浸入溶液中测溶液的pH

鉴别下丘脑、垂体性闭经的方法（）

A.经前诊刮

B.BBT

C.垂体兴奋试验（GnRH刺激试验）

D.卵巢兴奋试验

E.染色体检查

一位市民每天上班都会遇到堵车，经过仔细观察沿途路况后，他写信建议市政府改建一条右转机动车道。这位市民参与民主决策的方式是[ ]

A．信访举报制度

B．重大事项社会公示制度

C．社情民意反映制度

D．专家咨询制度

物料物品日常补货订货周期为（）一次。

A、半月

B、一月

C、45天

D、三个月

In the following essay, each blank has four choices. Choose the best answer and write down on the answer sheet.

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.

71（）

A．interval

B．time

C．slot

D．delay