问题 单项选择题

H2受体阻滞药主要用于治疗

A.呕吐

B.腹泻

C.消化不良

D.肝硬化

E.胃十二指肠溃疡

答案

参考答案:E

解析:
H2受体阻断药能阻断H2受体而抑制胃酸分泌。对五肽促胃液素、胆碱受体激动药及迷走神经兴奋所致的胃酸分泌也有明显的抑制作用。对心血管无影响,但可拮抗组胺的舒血管作用。用于消化性溃疡、胃及食管反流性疾病、胃酸分泌过多疾病(如卓-艾综合征)的控制。

单项选择题


阅读下面短文,回答下面问题。
动身访美之前,一位旧时同窗写来封航空信,再三托付我为他带几颗生枣核。东西倒不占分量,可是用途却很蹊跷。
从费城出发前,我们就通了电话。一下车,他已经在站上等了。掐指一算,分手快有半个世纪了,现在都已是风烛残年。
拥抱之后,他就殷切地问我:“带来了吗”我赶快从手提包里掏出那几颗枣核。他托在掌心,像比珍珠玛瑙还贵重。
他当年那股调皮劲显然还没改。我问起枣核的用途,他一面往衣兜里揣,一面故弄玄虚地说:“等会儿你就明白啦。”
那真是座美丽的山城,汽车开去,一路坡上坡下满是一片嫣红。倘若在中国,这里一定会有枫城之称。过了几个坳,他朝枫树丛中一座三层小楼指了指说:“喏,到了。”汽车拐进草坪,离车库还有三四米,车库门就像认识主人似的自动掀启。
朋友有点不好意思地解释说,买这座大房子时,孩子们还上着学,如今都成家立业了。学生物化学的老伴儿在一家研究所里做营养试验。
他把我安顿在二楼临湖的一个房间后,就领我去踏访他的后花园。地方不大,布置得却精致匀称。我们在靠篱笆的一张白色长凳上坐下,他劈头就问我:“觉不觉得这花园有点家乡味道”经他指点,我留意到台阶两旁是他手栽的两株垂杨柳,草坪中央有个睡莲池。他感慨良深地对我说:“栽垂柳的时候,我那个小子才五岁。如今在一条核潜艇上当总机械长了。姑娘在哈佛教书。家庭和事业都如意,各种新式设备也都有了。可是我心上总像是缺点什么。也许是没出息,怎么年纪越大,思乡越切。我现在可充分体会出游子的心境了。我想厂甸,想隆福寺。这里一过圣诞,我就想旧历年。近来,我老是想总布胡同院里那棵枣树。所以才托你带几颗种籽,试种一下。”
接着,他又指着花园一角堆起的一座假山石说:“你相信吗那是我开车到几十里以外,一块块亲手挑选,论公斤买下,然后用汽车拉回来的。那是我们家的‘北海’。”
说到这里,我们两人都不约而同地站了起来。穿过草坪旁用卵石铺成的小径,走到“北海”跟前。真是个细心人呢,他在上面还嵌了一所泥制的小凉亭,一座红庙,顶上还有尊白塔。朋友解释说,都是从旧金山唐人街买来的。
他告诉我,时常在月夜,他同老伴儿并肩坐在这长凳上,追忆起当年在北海泛舟的日子。睡莲的清香迎风扑来,眼前仿佛就闪出一片荷塘佳色。
改了国籍,不等于就改了民族感情,而且没有一个民族像我们这么依恋故土的。
(萧乾《枣核》)

对枣核在文中作用的解释,不恰当的一项是:

A.枣核被用来设置悬念。

B.枣核是作者带给同窗的礼物。

C.枣核被作为贯穿全文的线索。

D.枣核起到以小见大的作用。

问答题

Green space facilities are contributing to an important extent to the quality of the urban environment. Fortunately it is no longer necessary that every lecture or every book about this subject has to start with the proof of this idea. (46) At present it is generally accepted, although more as a self-evident statement than on the basis of a closely-reasoned scientific proof. The recognition of the importance of green space in the urban environment is a first step on the right way. (47) This does not mean, however, that sufficient details are known about the functions of green space in towns and about the way in which the inhabitants are using these spaces. As to this rather complex subject I shall, within the scope of this lecture, enter into one aspect only, namely the recreative function of green space facilities.
(48) The theoretical separation of living, working, traffic and recreation, which for many years has been used in town-and-country planning, has in my opinion resulted in disproportionate attention for forms of recreation far from home, whereas there has been relatively little attention for improvement of recreative possibilities in the direct neighborhood of the home. (49) We have come to the conclusion that this is not right, because an important part of the time which we do not pass in sleeping or working is used for activities at and around home. So it is obvious that recreation in the open air has to begin at the front door.
(50) The urban environment has to offer as many recreation activities as possible, and the design of these has to be such that more obligatory activities can also have a recreative aspect. The very best standard of living is nothing if it is not possible to take a pleasant walk in the district, if the children cannot be allowed to play in the streets, because the risks of traffic are too great, if during shopping you can nowhere find a spot for enjoying for a moment the nice weather, in short, if you only feel yourself at home after the front door is shut.