很少引起产褥感染，一旦造成感染则非常严重的是（） A.厌氧性链球菌 B.溶血性链球菌

一般资料：求助者，男性，18岁，高中三年级学生。案例介绍：半年前的一天，求助者乘公交车回家，人多拥挤，碰了一位女孩，并踩了她的脚，女孩厌恶地骂他有病。当时自己觉得心跳加快、脸红。从此，只要见到异性，就很紧张、慌乱，此后上课时注意力无法集中，无法安心学习。后来发展到与同桌、与老师交往也不敢看对方。明明知道没什么可害怕的，但就是控制不住。从此，很少参加集体活动，与同学越来越疏远，感觉没有人可以理解、信任和帮助自己。自卑、孤独，情绪很不稳定，学习成绩明显下降，无法坚持正常学习。与家人交往尚正常，但言语较少。心理咨询师观察和了解到的情况：求助者从小腼腆，家中来客人经常避而不见。不太与人交往，伙伴较少。学习成绩一直较好。求助者衣着整齐，有礼貌，表情不自然，情绪较低落，不敢与心理咨询师目光接触。

该求助者（）。

A.植物神经功能正常

B.不回避社交活动

C.社会功能明显受损

D.感到生活无意义

Hai is the general director of a company that manages bookings for a traditional dancing act that performs throughout Vietnam. He manages contracts with customers, as well as the administration arrangements for the act’s appearances, including hotels and travel.Hai concluded a contract with a concert organiser in Ho Chi Minh City. The contract specified the fee to be paid for the dancing act to appear, and a fixed sum to cover accommodation and travel from Hanoi. Three weeks before the concert in Ho Chi Minh City, Hai decided to organise flights for the performers but discovered that due to a fuel crisis the fares for the flights would be 60% more expensive than originally estimated. Hai decided to withdraw from the contract as he did not wish to incur a loss.Hai concluded a similar contract with a concert organiser in Da Nang. On the morning of the day on which the concert was planned to take place, the theatre was seriously damaged by fire, causing the cancellation of the concert by the organiser. The dancing act had already travelled to Da Nang and had paid for all travel and accommodation necessary for its appearance. Hai decided to invoice the organiser for the full fee and expenses incurred.Required:

(a) Discuss the potential liability of Hai’s company in respect of its withdrawal of the dancing act from the appearance in Ho Chi Minh City. (5 marks)

类的析构函数的作用是( )。

A．一般成员函数

B．类的初始化

C．对象的初始化

D．删除对象

当客户对凭证有疑问时，应怎样说？

航空界有个关于飞行安全的“海恩法则”：每一起严重事故的背后，必然有29次轻微事故和300起未遂先兆及1000起事故隐患。“海恩法则”启示我们（）

A.规律是客观的，我们要善于发现和利用规律

B.矛盾是普遍的、客观的

C.量变是质变的前提，质变是量变的必然结果

D.任何事物之间都存在联系