在问题形成的原因中，如果有了某种原因，就一定出现某种问题，如果没有某种原因，则不一定

一个盒子里有100只分别涂有红、黄、绿三种颜色的球。
张三说：“盒子里至少有一种颜色的球少于33只。”
李四说：“盒子里至少有一种颜色的球不少于34只。”
王五说：“盒子里任意两种颜色的球的总数不会超过99只。”
以下哪项论断是正确的？（）

A．张三和李四的说法正确，王五的说法不正确。

B．李四和王五的说法正确，张三的说法不正确。

C．王五和张三的说法正确，李四的说法不正确。

D．张三、李四和王五的说法都不正确。

E．张三、李四和王五的说法都正确。

肾功能不良伴有中度糖尿病病人宜选用

A．胰岛素

B．苯乙双胍

C．二甲双胍

D．罗格列酮

E．氯磺丙脲

I came across an old country guide the other day. It listed all the tradesmen in each village in my part of the country, and it was impressive to see the great variety of services which were available on one’s own doorstep in the late Victorian countryside.

Nowadays a superficial traveler in rural England might conclude that the only village tradesmen still flourishing were either selling frozen food to the inhabitants or selling antiques to visitors. Nevertheless, this would really be a false impression. Admittedly there has been a contraction of village commerce, but its vigor is still remarkable.

Our local grocer’s shop, for example, is actually expanding in spite of the competition from supermarkets in the nearest town. Women sensibly prefer to go there and exchange the local news while doing their shopping, instead of queueing up anonymously at a supermarket. And the proprietor knows well that personal service has a substantial cash value.

His Prices may be a bit higher than those in the town, but he will deliver anything at any time. His assistants think nothing of bicycling down the village street in their lunch hour to-take a piece of cheese to an old-age pensioner who sent her order by word of mouth with a friend who happened to be passing. The more affluent customers telephone their shopping lists and the goods are on their doorsteps within an hour. They have only to hint at a fancy for some commodity outside the usual stock and the grocer, a red-faced figure, instantly obtains it for them.

The village gains from this sort of enterprise, of course. But I also find it satisfactory because a village shop offers one of the few ways in which a modest individualist can still get along in the world without attaching himself to the big battalions of industry or commerce.

Most of the village shopkeepers I know, at any rate, are decidedly individualist in their ways. For example, our shoemaker is a formidable figure: a thick-set, irritable man whom children treat with marked respect, knowing that an ill-judged word can provoke an angry eruption at any time. He stares with contempt at the pairs of cheap, mass-produced shoes taken to him for repair: has it come to this, he seems to be saying, that he, a craftsman, should have to waste his skills upon such trash But we all know he will in fact do excellent work upon them. And he makes beautiful shoes for those who can afford such luxury.

The local grocer’s shop is expanding even though （） .

A．town shops are more attractive

B．town shops are larger and less well-known

C．people like to shop where they are less well-known

D．people get extra service in townshops

简述植物新品种授予的法定条件。

原本定在周三上午召开的会议因临时有事取消了，改在周五下午。我不得不翻开通讯录，一个一个地电话通知所有要参加会议的人。秘书工作就是这样，得随时准备着应对各种可能发生的变化。

A．周五的会议取消了
B．会议还在本周举行
C．秘书的工作很不稳定
D．秘书的工作每天都一样