按照流程规范，在（）应及时与客户签订供用电合同和相关协议。 A.签订供电方案后 B.

选做题（请从A、B和C三小题中选定两小题作答，如都作答，则按A、B两小题评分．）

（1）以下说法中正确的是______  

A．拍摄玻璃橱窗内的物品时，往往在镜头前加一个偏振片以增加透射光的强度

B．全息照片往往用激光来拍摄，主要是利用了激光的相干性   

C．超声波可以在真空中传播

D．根据宇宙大爆炸学说，遥远星球发出的红光被地球接收到时可能是红外线

（2）平行光a垂直射向一半径为R的玻璃半球的平面，其截面如图所示，发现只有P、Q之间所对圆心角为60°的球面上有光射出，则玻璃球对a光的折射率为______，若仅将a平行光换成b平行光，测得有光射出的范围增大，设a、b两种色光在玻璃球中的速度分别为v_a和v_b，则v_a______v_b（选填“＞”、“＜”或“=”）．

（3）在均匀介质中选取平衡位置在同一直线上的9个质点，相邻两质点间的距离均为0.1m，如图（a）所示．一列横波沿该直线向右传播，t=0时到达质点1，质点1开始向下运动，振幅为0.2m，经过时间0.3s第一次出现如图（b）所示的波形．试写出质点1的振动方程．

葡萄胎患者随访的时间是（）。

A.3个月

B.6个月

C.1年

D.2年

E.3年

一般资料：马某，男性，16岁，学生表现出的问题：母子二人一起来访，孩子已经16岁了，今年上初三。孩子每说一句话之前，就得看看母亲的眼色，获得母亲的首肯，才敢讲话。孩子的讲话，也每每被母亲打断，加以解释、更正、澄清。孩子的行为举止，很像一个幼儿园的学龄前儿童，不时地，还与妈妈撒撒娇，与一个16岁的男孩子很不相称。上初中以后，求助者注意力不集中，学习成绩直线下降，特别害怕与同学相处、害怕压力、害怕考试，于是焦虑、紧张不安，并伴有失眠、头痛、全身酸痛等症状，孩子只好中途退学。既往生活史与当前生活情景：求助者从小性格内向，母亲很宠爱他，对孩子的一切事务都要亲自打理。可是，上了初中以后，孩子学习成绩直线下降，特别害怕与同学相处、害怕压力、害怕考试。尽管母亲用尽了所有办法，但全都无济于事。没办法，孩子只好中途退学。退学后，想了好多办法，什么读技校、上中专，自学成才呀，都试过了。每个计划在最初进行的时候，孩子都是踌躇满志的，可一旦真的进行下去，孩子就虎头蛇尾，坚持不下去。母亲还说："孩子为自己的前途，整天急得就像热锅上的蚂蚁，吃不好，也睡不着，想来想去，也拿不出个主意。实在想不出来了，就来问我，我说了一大堆，最后又被他一一否定了。这时候，他就会气急败坏地发火、摔东西、踢桌子，有时侯，还使劲拧我的胳膊。您看看，我这些红印全是他昨天拧的。现在我不明白了，我付出了这么多，为什么会是这样的结果？"根据案例，请回答以下问题：

在心理咨询过程中，有效地使用积极关注应注意哪些问题？

In 1957 a doctor in Singapore noticed that hospitals were treating an unusual number of influenza-like cases. Influenza is sometimes called “flu” or a “bad cold”. He took samples from the throats of patients in his hospital and was able to find the virus of this influenza.

There are three main types of the influenza virus. The most important of these are types A and B, each of them having several sub-groups. With the instruments at the hospital the doctor recognized that the outbreak was due to a virus group A, but he did not know the sub-group. He reported the outbreak to the World Health Organization in Geneva. W. H.O. published the important news alongside reports of a similar outbreak in Hong Kong, where about 15%—20% of the population had become ill.

As soon as the London doctors received the package of throat samples, they began the standard tests. They found that by reproducing itself at very high speed, the virus had multiplied more than a million times within two days. Continuing their careful tests, the doctors checked the effect of drugs used against all the known sub-groups of virus type A. None of them gave any protection. This then, was something new: a new influenza virus against which the people of the world had no ready help whatsoever. Having isolated the virus they were working with, the two doctors now dropped it into the noses of some specially selected animals, which contact influenza in the same way as human beings do. In a short time the usual signs of the disease appeared. These experiments revealed that the new virus spread easily, but that it was not a killer. Scientists, like the general public, called it simply “Asian” flu.

The first discovery of the virus, however, was made in China before the disease had appeared in other countries. Various reports showed that the influenza outbreak started in China, probably in February of 1957. By the middle of March it had spread all over China. The virus was found by Chinese doctors early in March. But China was not a member of the World Health Organization and therefore did not report outbreaks of disease to it. Not until two months later, when travelers carried the virus into Hong Kong, from where it spread to Singapore, did the news of the outbreak reach the rest of the world. By this time it was started on its way around the world.

Thereafter, WHO’s Weekly Reports described the steady spread of this virus outbreak, which within four months swept through every continent.

London doctors considered（）

A. “Asian” flu as a bad cold

B. there were three main types of influenza virus

C. it was necessary to test the other virus groups besides group

D. the influenza called “Asian” flu a new one

《西湖七月半》作者赞赏的一类看月人是（）。

A.“亦在月下亦看月而欲人看其看月”

B.“名为看月而实不见月”

C.身在月下而实不看月”

D.“看月而人不见其看月之态，亦不作意看月者”