按照《99规则》的《非国际航行海船法定检验技术规则》的规定，救生艇降落和回收装置有何

单站验证测试的目的是在RF优化后，保证待优化区域中的各个站点各个小区的基本功能均是正常的。（）

（14分）三种短周期元素ｘ、y、ｚ对应的单质X、Y、Z，常温常压下均为无色气体，在适当条件下单质X、Y、Z之间可以发生如右图所示的变化。已知B分子组成中ｚ原子个数比C分子中少一个。

请回答下列问题：

（1）元素ｘ的原子结构示意图         ；元素y在周期表中的位置是            ；

（2）已知C的浓溶液与浓盐酸相遇可产生白烟，写出白烟成分的电子式：

                    。

（3）C与X在一定条件下生成化合物A的化学方程式：                        。

（4）一定条件下，A与C反应可生成Y和B，请写出该反应的化学方程式；并用单线桥法标出电子转移的方向与数目。

                                              。

（5）用电子式表示B的形成过程                                          。

The ABC Bank Irrevocable documentary credit Number: LC123-258866 Date: August 24,1999 Date and place of expiry : October 30, 1999 China Advising bank: Bank of China Beneficiary: China XYZ import and export corp. Applicant: UVW corporation. Amount: USD52,500 (Say U.S Dollars fifty two thousand five hundred only) We hereby issue irrevocable documentary credit which is available with: Any bank By negotiation of beneficiary’s drafts at sight For full invoice value Drawn on the ABC bank Partial shipments: Not allowed Transshipment: Not allowed Shipment from: Shanghai To: Tokyo Japan At the latest: October 15, 1999 Following documents required: +Signed commercial invoice in three copies +Full set of clean on board ocean bill of lading +Weight certificate in two copies Covering: 100 metric tons (5PCT MOL) of XY chemical in drums at USD 500 per M/T. Special instructions: Insurance to be effected by buyer. Instructions to advising bank: Please advise this credit to the beneficiary We hereby undertake that drawers, endorsers in compliance with the terms of this credit will be duly honored upon presentation to the drawee bank. Authorized signature 一、根据上述信用证，回答下列问题

信用证号码

癫痫持续状态通常指的是（）

A.全身性强直-阵挛发作持续状态

B.失神性癫痫状态

C.肌阵挛性癫痫状态

D.部分性癫痫状态

E.复杂部分性癫痫状态

运营监管工作的目标是（）。

A.督促农各级对外营业机构及运营后台操作中心严格执行临柜业务各项规章制度

B.推动营业机构“三化三铁”活动的持续深入开展

C.防范和化解运营操作风险

D.不断提升运营基础管理水平