以上哪种指数操作简便，重复性好，适合于大规模的口腔流行病学调查（） A.OHI-S

句型转换。

1.My vacation was great!(对划线部分提问)

         was your vacation?

2.I went to summer camp during my holiday.(对划线部分提问)

                  you          during your holiday?

3.The weather was hot and humid.(对划线部分提问)

         was the weather?

4.Ann went to the mountain by car.(对划线部分提问)

                  Ann          to the mountain?

5.Tom was in the New York City last year.(改为一般疑问句)

         Tom in the New York City last year?

6.She went to the beach last Sunday.(变一般疑问句)?

7.The weather was hot and humid.(变否定句)?

8.They stayed at home on vacation.(就划线部提问)?

_______  _______ they _______ on vacation?

9.Nancy went to the cinema last night.(改为同义句)?

10.The people in New York were friendly. (就划线部分提问)?

_______  _______ the people in New York?

临床注射替米考星后，其毒性作用主要体现在（）

A.消化道系统

B.呼吸道系统

C.心血管系统

D.泌尿生殖系统

E.免疫抑制

乙公司向甲公司发出要约，旋即又发出一份“要约作废”的函件。甲公司的董事长助理收到乙公司的要约之后，很快又收到了“要约作废”的函件，但其忘记将“要约作废”的函件交给董事长。第三天甲公司董事长发函给乙公司，提出只要将交货日期推迟两个星期，其他条件都可接受。后甲、乙公司未能缔约，双方缔约没能成功的原因是( )。

A．要约已被撤回

B．要约已被撤销

C．甲公司对要约作了实质性改变

D．甲公司承诺超过了有效期间

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.

The example of the pupils’ 1 earning about Mexico shows that ______.

A．a child usually learns the right things from their teachers

B．a teacher can correct a pupil’s wrong ideas

C．a teacher’s attitude can influence a child’s attitude by teaching

D．a child’s attitude is very changeable

关于角膜的厚度正确说法是（）

A.周边1.2mm，中央0，7～0.8mm

B.周边0.7～0.8mm，中央1.2mm

C.周边1.Omm，中央0.30～0.57mm

D.周边0.6～0.7mm，中央1.Omm

E.周边1.0mm，中央1.0mm