证券账户一旦遗失，可按规定要求办理挂失手续。( )

诊断多囊卵巢综合征应排除以下何种疾病（）

A.Cushing综合征

B.侏儒症

C.先天性肾上腺皮质增生

D.甲状腺功能减退症

E.卵巢男性化肿瘤

Language as a System of Symbols

Of all systems of symbols(符号), language is the most highly developed. It has been pointed out that human beings, by agreement, can make anything stand for anything. Human beings have agreed, in the course of centuries of mutual(相互的)dependency, to let the various noises that they can produce with their lungs, throats, tongues, teeth, and lips systematically stand for certain happenings in their nervous systems. We call that system of agreements language.

There is no necessary connection between the symbol and that which it stands for. Just as social positions can be symbolized by feathers worn on the head, by gold on the watch chain, or by a thousand other things according to the culture we live in, so the fact of being hungry can be symbolized by a thousand different noises according to the culture we live in.

However obvious these facts may appear at first glance, they are actually not so obvious as they seem except when we take special pains to think about the subject. Symbols and the things they stand for are independent of each other, yet we all have a way of feeling as if, and sometimes acting as if, there were necessary connections. For example, there are people who feel that foreign languages are unreasonable by nature; foreigners have such funny names for things, and why can’t they call things by their right names? This feeling exhibits itself most strongly in those English and American tourists who seem to believe that they can make the natives of any country understand English if they shout loud enough. Like the little boy who is reported to have said: “Pigs are called pigs because they are such dirty animals,” they feel that the symbol is inherently(内在地) connected in some way with the things symbolized.

69. Language is a highly developed system of symbols because human beings ______.

A. have made use of language for centuries         B. use our nervous systems to support language

C. have made various noises stand for any events

D. can make anything stand for anything by agreement

70. What can we conclude from Paragraph 2?

A. Different noises may mean different things.   

B. Our culture determines what a symbol stands for.

C. The language we use symbolizes our social positions.

D. Our social positions determine the way we are dressed.

71. In Paragraph 3, “take special pains” probably means “_____”.

A. try very hard     B. take our time     C. are very unhappy      D. feel especially painful

72. The example of the little boy is used to show that _____.

A. adults often learn from their young               

B. “pig” is a dirty word because pigs are dirty

C. words are not connected with the things they stand for

D. people sometimes have wrong ideas about how language works

我国现阶段的基本经济制度是由我国的分配制度决定的。 [ ]

握手的距离一般在15~75厘米之内，被称为（）。

A．个人界域

B．亲热界域

C．社交界域

D．大众界域

农村患儿男，4个半月，因“双下肢无力15d”来诊。35d前口服“脊髓灰质炎疫苗（糖丸）”，1周后出现发热伴鼻塞、流涕和腹泻。当地医院给予静脉输液1d，肌内注射“抗生素”4d后热退，其他症状随之缓解。15d前患儿出现双下肢无力，不能做蹬踏动作；病初数天精神、食欲欠佳，易哭闹，多汗，未再出现发热及腹泻；至今仅足背可做轻微背伸运动。查体：营养发育中等；心、肺无异常；肝肋下1.5cm，脾肋下可及；双上肢活动自如，双下肢肌张力减低，以左侧明显，腱反射消失，病理反射阴性。

目前可能出现的并发症有（）

A.呼吸肌麻痹

B.褥疮

C.脑水肿

D.骨质脱钙

E.肝功能不良

F.尿路感染

G.肺炎

H.心肌损害