问题 单项选择题

硝酸甘油、普萘洛尔、维拉帕米治疗心绞痛的共同作用机理是

A.减慢心率

B.缩小心室容积

C.扩张冠脉

D.抑制心肌收缩力

E.降低心肌耗氧量

答案

参考答案:E

单项选择题

A


"In only six clays I lost seven pounds of weight. "
"Two full inches in the first three days!"
These are the kinds of statements used in magazine, newspaper, radio and television ads. , promising new shapes and new looks to those who buy the medicine or the device. The promoters of products say they can shape the legs, slim the face, smooth wrinkles, or in some other ways to add to beauty or desirability.
Often such products are nothing more than money-making things for their promoters. The results they produce are questionable, and some are dangerous to health.
To understand how these products can be legally promoted to the public, it is necessary to understand something of the laws covering their regulation. If the product is a drug, FDA (Food and Drug Administration)can require proof (证明) under the Food, Drug, and Cosmetic Act that is safe and effective before it is put on the market. But if the product is a device, FDA has no authority to require pre-marketing proof of safety or effectiveness. If a product already on the marker is a danger to health, FDA can request the producer or distributor to remove it from the market voluntarily, or it can take legal action, including seizure (查封) of the product.
One notable case a few years ago involved an electrical device called the Relaxacisor, which had been sold for reducing the waistline. The Relaxacisor produced electrical shocks to the body through contact pads. FDA took legal action against the distributor to stop the sale of the device on the grounds that it was dangerous to health and life.
Obviously, most of the devices on the market have never been the subject of court proceedings (法律诉讼), and new devices appear continually. Before buying, it is up to the consumer to judge the safety or effectiveness of such items.

FDA can ask for the proof of safety and effectiveness of a product ______.

A.if it is a drug

B.if it is a device

C.if its consumers make complaints

D.if its distributors challenge FDA’s authority

阅读理解与欣赏

阅读下面的文言文,完成1-4题。

  往余在吴中,常郁郁无所交,出门至于淮上,临河不渡,彷徨者久之,因与其地之贤人长者相结,而王君起田最与余善,自此一二年或三四年一过也。

  王君与余同年月生,而长余二十余日,其行事虽不同而意相得,凡余心之所存,及是非好恶无不同者,虽不学古而暗合于义,仁而爱人,乐善不倦,其天性然也。生八岁而孤,事母孝,事其兄恭,其居财也有让。少为帖括之学,及中年,遂闭户不试。家颇饶,每受人负,折券不较,以是其产稍落,而四方宾客至者,未尝不与之周旋。

  当余在太原,而余友潘力田死于杭,系累其妻子以北。少弟耒年十八,孑身走燕都,介余一苍头以见王君。王君曰:“我固闻之。宁人尝与我言,潘君力田,贤士也,不幸以非命终。而宁人之友弟,则犹之吾弟也。”迎而舍之。比其归也,则曰:“家破矣,可奈何!吾有女年且笄,将婿子。”间二年,耒遂就昏。王君与耒非素识也,特以宁人之友故,而余在远,弗及为之从臾也。

  每为余言:“子行游天下二十年,年渐衰,可已矣!幸过我卜筑,一切居处器用,能为君办之。”逡巡未果,而别君之日,持觞送我大河之北,留一宿,视余上马,为之出涕,若将不复见者。乃明年,余遂有山东之厄,而海、岱以南大震,君亦为里中儿所齮齕,意不自得。又明年六月庚午,君卒。

  惟君生平以朋友为天伦,其待余如昆弟,而余以穷厄蹇连,无能申大义于诈愚凌弱之日者。以十九年之交,再三之约,而不获与之分宅卜邻,同晨共夕;其终也,又不获视其含敛,而抚其遗孤。吁,可悲矣!

  君讳略,字起田,淮安山阳人。家清江浦之南,卒时年五十七。(选自《顾炎武诗文选译》)

  【注】①帖括:科举考试文体名称。②系累:捆绑,拘囚。③宁人:即顾炎武。他原名绛,字宁人。④从臾:同“怂恿”,劝导。⑤齮齕(yǐhé):咬噬。这里引申为毁谤、中伤。⑥含敛:意思是办理丧事。

1、对下列句子中加粗词语的解释,不正确的一项是( )

A、自此一二年或三四年一也 过:拜访。

B、每受人负 负:亏欠。

C、迎而之 舍:留人居住。

D、逡巡未果 逡巡:滞留。

2、下列各组句子中,加粗词的意义和用法相同的一组是( )

A、①王君余同年月生 ②宁人尝我言

B、①少帖括之学 ②能君办之

C、①其居财有让 ②比其归

D、①朋友为天伦 ②而余穷厄蹇连

3、下列对原文有关内容的赏析,不正确的一项是( )   

A、王略年幼时丧父,少年时学习经文,但中年时放弃了科举考试。他家境富饶,为人仁爱、谦让。

B、王略将女儿嫁给潘耒,因为他是自己朋友的朋友的弟弟,而且已经家破人亡

C、作者断然拒绝了王略给他买屋定居的请求,分别时,王略依依不舍地送行到黄河之北。

D、作者怀念朋友王略,既有敬佩、感激之情,也有自己不能帮助朋友的内疚、痛苦之情。

4、请将文中划横线的句子翻译成现代汉语。

  君亦为里中儿所齮齕,意不自得。

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