我国近年来引起菌痢最常见的病原菌是 A．志贺痢疾杆菌 B．福氏痢疾杆菌 C

一个多边形的外角和加上180°等于其内角和，则这个多边形为（　　）

A．四边形

B．五边形

C．六边形

D．七边形

步枪枪膛里火药爆炸产生的气体往外推子弹的力量是11760N，把子弹从枪膛里推出共做了7291.2J的功．求枪膛的长．

对支原体肺炎具有重要诊断意义的是（）

A.多发于冬春季

B.症状轻

C.两肺或一侧肺阴影

D.冷凝集试验阳性

E.以上都不是

请用不超过150字的篇幅，全面，有条理，有层次地概括出给定材料所反映的主要问题，并概括出在征收遗产税问题方面对立双方的意见和理由，字数不超过400字。

Manners nowadays in metropolitan cities like London are practically non-existent. It is nothing for a big, p schoolboy to elbow an elderly woman aside in the dash for the last remaining seat on the tube or bus, much less stand up and offer his seat to her, as he ought. In fact, it is saddening to note that if a man does offer his seat to an older woman, it is nearly always a Continental man or one from the older generation.

This question of giving up seats in public transport is much argued about by young men, who say that, since women have claimed equality, they no longer deserve to be treated with courtesy, and that those who go out to work should take their turn in the rat race like anyone else. Women have never claimed to be physically as p as men. Even if it is not agreed, however, that young men should stand up for younger women, the fact remains that courtesy should be shown to the old, the sick and the burdened.

Conditions in travel are really very hard on everyone, we know, but hardship is surely no excuse. Sometimes one wonders what would have been the behavior of these stout young men in a packed refugee train or a train on its way to a prisoner-camp during the war. Would they have considered it only right and their proper due to keep the best places for themselves then

Older people, tired and irritable from a day’s work, are not angels, either--far from it. Many a brisk argument or an insulting quarrel breaks out as the weary queues push and shove each other to get on buses and tubes. One cannot commend this, of course, but one does feel there is just a little more excuse.

If cities are to remain pleasant places to live in at all, however, it seems urgent, not only that communications in transport should be improved, but also that communication between human beings should be kept smooth and polite. All over cities, it seems that people are too tired and too rushed to be polite. Shop assistants won’t bother to assist, taxi drivers shout at each other as they dash dangerously round corners, bus conductors pull the bell before their desperate passengers have had time to get on or off the bus, and so on and so on. It seems to us that it is up to the young and p to do their small part to stop such deterioration.

From what you have read, would you expect manners to improve among people who（）

A. are physically p

B. live in big modern cities

C. are from the older generation

D. live only in metropolitan cities