传统礼俗规约的特点是（）（）（）。

Generally speaking, a British is widely regarded as a quiet, shy and conservative person who is (1) only among those with whom he is acquainted. When a stranger is at present, he often seems nervous, even (2) . You have to take a commuter train any morning or evening to (3) the truth of this.

Serious-looking businessmen and women sit reading their newspapers or dozing in a corner; hardly anybody talks, since to do so would be considered quite (4) .

(5) , there is an unwritten but clearly understood code of behavior which, once broken, makes the offender immediately the object of (6) .

It has been known as a fact that a British has a (7) for the discussion of their weather and that, if given a chance, he will talk about it (8) .

Some people argue that it is because the British weather seldom (9) forecast and hence becomes a source of interest and (10) to everyone.

This may be so. (11) a British cannot have much (12) in the weathermen, who, after promising fine, sunny weather for the following day, are often proved wrong (13) a cloud over the Atlantic brings rainy weather to all districts! The man in the street seems to be as accurate — or as inaccurate — as the weathermen in his (14) .

Foreigners may be surprised at the number of references (15) weather that the British (16) to each other in the course of a single day. Very often conversational greetings are (17) by comments on the weather. “Nice day, isn’t it” “Beautiful!” may well be heard instead of “Good morning, how are you” Although the foreigner may consider this exaggerated and comic, it is (18) .pointing out that it could be used to his advantage. If he wants to start a conversation with a British but is at a loss to know (19) to begin, he could do well to mention the state of the weather. It is a safe subject which will (20) an answer from even the most reserved of the British.

13（）

A.since

B.once

C.when

D.while

算法：

S₁  m=a

S₂  若b＜m，则m=b

S₃  若c＜m，则m=c

S₄  若d＜m，则 m=d

S₅  输出m，则输出m表示（　　）

A．a，b，c，d中最大值

B．a，b，c，d中最小值

C．将a，b，c，d由小到大排序

D．将a，b，c，d由大到小排序

反映药物作用趋势的是

A．四气

B．五味

C．归经

D．毒性

E．升降浮沉

冲洗泪道时，如生理盐水流入鼻腔或咽部，表示泪道通畅；如从上泪点返流，则为________；如有脓性分泌物返流，则为________。

使用机械设备不准（）运行。

A.超温

B.超压

C.超负荷

D.带病