某篮球运动员在罚球线投中球的概率为23，在某次比赛中罚3球恰好命中2球的概率为_

The usual way to ensure reliable delivery is to provide the (71) with some feedback about what is happening at the other end of the line. Typically, the protocol calls for the receiver to send back special (72) flame bearing positive or negative (73) about the incoming frames. If the sender receives a positive acknowledgement about a frame, it knows the frame has arrived safely. On the other hand, a negative acknowledgement means that’ something has gone wrong, and the frame must be transmitted again.

An additional complication comes from the possibility that hardware troubles may cause a flame to (74) completely. In this case, the receiver will not react at all, since it has no any reason to react. It should be clear that a protocol in which the sender transmits a frame and then waits for an acknowledgement, positive or negative, will hang forever if a frame is ever lost due to, for example, (75) hardware.

（73）处应填（）。

A．application

B．connection

C．stream

D．acknowledgement

某男，55岁，右下肢持续掣痛2天，疼痛难忍，以右下肢疼痛沿股后向小腿后外侧放射为主。针灸治疗应主选的是（）

A.足少阳经穴

B.足太阳经穴

C.足阳明经穴

D.足少阴经穴

E.足太阴经穴

关于统计行政复议的审查，下列表述正确的有( )。

A．统计行政复议的审查是统计行政复议的关键阶段

B．统计行政复议采取实质审查的办法

C．统计行政复议的审查，是统计行政复议机关对该案件的事实、证据、法律适用及争论的焦点等进行审查的过程

D．在审查范围上实行全面审查的原则

E．受原具体统计行政行为内容范围的限制

“四不放过”指的什么？