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问题 单项选择题 A1/A2型题

癌的常见肉眼形态特点是（）

A.分叶状，可有或无包膜，切面灰红、质硬

B.形状不定，切面灰白色，质硬，干燥，呈树根状向周围组织浸润

C.结节状、有包膜，切面灰白色质硬

D.不规则结节状，有无完整包膜不定，切面灰红、湿润如鱼肉状

E.分支 * * 状或绒毛状，根部有蒂与正常组织相连

答案

参考答案：B

解析：肿瘤的肉眼形态描述包括肿瘤的数目、大小、形状、颜色、质地等，临床上正确描述肿瘤的肉眼形态有助于判断肿瘤的类型、区分肿瘤的良恶性。如良性肿瘤通常形状规则，包膜完整，恶性肿瘤形状不定、边界不清；癌的质地较硬、颜色灰白，浸润性生长；肉瘤颜色灰红、湿润如鱼肉状。

单项选择题

Of all the areas of learning the most important is the development of attitudes. Emotional reactions as well as logical thought processes affect the behavior of most people.
"The burnt child fears the fire" is one instance; another is the rise of despots like Hitler. Both examples also point up the fact that attitudes stem from experience. In one case the experience was direct and impressive; in the other it was indirect and cumulative. The Nazis were indoctrinated largely by the speeches they heard and the books they read.
The classroom teacher in the elementary school is in a strategic position to influence attitudes. This is true partly because children acquire attitudes from those adults whose word they respect.
Another reason it is true is that pupils often delve somewhat deeply into a subject in school that has only been touched upon at home or has possibly never occurred to them before. To a child who had previously acquired little knowledge of Mexico, his teacher’s method of handling such a unit would greatly affect his attitude toward Mexicans.
The media through which the teacher can develop wholesome attitudes are innumerable. Social studies (with special reference to races, creeds and nationalities), science matters of health and safety, the very atmosphere of the classroom... these are a few of the fertile fields for the inculcation of proper emotional reactions.
However, when children come to school with undesirable attitudes, it is unwise for the teacher to attempt to change their feelings by cajoling or scolding them. She can achieve the proper effect by helping them obtain constructive experiences.
To illustrate, first grade pupils afraid of policemen will probably alter their attitudes after a classroom chat with the neighborhood officer in which he explains how he protects them. In the same way, a class of older children can develop attitudes through discussion, research, outside reading and all-day trips.
Finally, a teacher must constantly evaluate her own attitudes, because her influence can be deleterious if she has personal prejudices. This is especially true in respect to controversial issues and questions on which children should be encouraged to reach their own decisions as a result of objective analysis of all the facts.

From the last paragraph, we can see that ______.

A．a teacher’s influence on children is always positive

B．children should be encouraged to reach their own decisions by ignoring objective facts

C．if improperly handled, a teacher’s influence can be very harmful to the children

D．children may develop prejudices if the teacher’s attitude is wrong
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单项选择题

治疗重度妊高征孕妇，首选药物应是

A．降压药
B．利尿药
C．解痉药
D．镇静药
E．扩容剂
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