问题 单项选择题

操作灵活,使用方便,在一般平整坚实的场地上可载荷行驶作业的吊装设备是( )。

A.汽车起重机

B.履带起重机

C.轮胎起重机

D.塔式起重机

答案

参考答案:B

阅读理解

Very old people do raise moral problems for almost everyone who comes into touch with them.Their values---this can not be repeated too often--aren’t necessarily our values.Physical comfort,cleanness and order are not necessarily the most important things.The social services from time to time find themselves faced with a room with rotten food covered by small worms,and an old person lying alone on bed,taking no notice of the worms.But is it interrupting personal freedom to insist that they go to live with some of their relatives so that they might be taken better care of? Some social workers,the ones who clear up the worms,think we’re in danger of carrying this idea of personal freedom to the point where serious risks(冒险)are being taken with the health and safety of the old.

Indeed,the old can be easily hurt or harmed.The old is like a car: it needs more mechanical repair as it gets older.You can carry this comparison right through to provision of spare parts.But never forget that such operations are painful experiences,however good the results are.And at what point should you stop to treat the old body?Is it morally right to try to push off death by continuing the development of medicine to excite the forgetful old mind and to make the old body active,knowing that it is designed to die?You cannot ask doctors or scientists to decide,because so long as they can see the technical chances,they will feel it necessary to give them a try,by the rule that while there’s life,there’s hope.

Talking to the old,however,you’re forced to the conclusion that whether age is happy or unpleasant depends less on money or health than it does on your ability to have fun.

小题1:After reading Paragraph 1,we learn that____.

A.very old people are able to keep their living places very clean

B.old people enjoy living alone so as to have more personal freedom

C.every old people enjoy living with their relatives

D.social services have nothing to do with very old people小题2:Some social workers think that_____.

A.old people should keep their living places clean

B.one should not take risk dealing with old people

C.health and safety are more important than personal freedom

D.personal freedom is more important than health and safety小题3:In Paragraph 3,the underlined word“it”refers to____.

A.one’s memory or health

B.the conclusion you have come to

C.whether age is happy or unpleasant

D.your talk to the old people小题4:The writer of this passage thinks that_______.

A.it is always morally right to treat old people and push off death

B.the opinion that we should try every means possible to save old people is uncertain

C.old people can enjoy a happy life only if they are very rich

D.medical decisions for old people should be left to the doctors

单项选择题

阅读以下文字,完成以下问题。
据美国《华盛顿邮报》日前报道,在美国明尼苏达州,一些猪的血管中流淌着人类的血液;在美国内华达州,一些绵羊拥有着人类的肝脏;在美国加利福尼亚州,一些拥有人类脑细胞的老鼠从它们的笼子中向外界窥望……
据报道,生物学家们将这些带有人类血液或细胞的动物称做“混血赫迈拉”(hybrid-schimeras),赫迈拉是希腊传说中拥有狮头、羊身、蛇尾的吐火怪兽,在过去数年中,美国科学家将人类的干细胞加入到了许多动物的发展胚胎中,秘密炮制出了许多实验性的“混血赫迈拉”产品。
据报道,在一个正在进行的实验中,美国明尼苏达州罗切斯特马约医院的杰弗里•普拉特医生通过将人血干细胞注入进猪的胚胎,已经建立了一些“人猪赫迈拉”,这些猪体内的血管中既流着猪的血,也流着人的血。普拉特称,一些人血细胞和猪血细胞已经自然发生结合,这对医学界是一项重要的发现。因为科学家一直在考虑将一些猪器官移植到病人身上,但同时又不知道猪身上的病毒会不会潜入人体内,对人类形成危害。如今科学家发现这一担心是真实的,因为猪体内的病毒可以通过人猪细胞的融合获得感染人类的途径。
在另外一些实验中,以美国内华达大学的伊斯梅尔•赞贾尼为首的科学家已经将人类干细胞添加到了绵羊的胚胎中,炮制出了一些“人羊赫迈拉”,如今这些“混血羊”体内的肝脏——80%的成分都属于人类的肝脏。还有一些实验中,科学家将人类的脑细胞注进老鼠的头盖骨内,这些拥有人类脑细胞的老鼠从它们的笼子中向外窥望时,天知道它们的脑海中在想些什么。
在过去数年中,美国科学家将人类的干细胞加入到了许多动物的发展胚胎中,秘密炮制出了许多实验性的“混血赫迈拉”产品。
然而,当科学家试图将整个人体器官放在动物的体内生长,“混血赫迈拉”实验就成了二个非常敏感的话题。当科学家试图将人类脑细胞也注入动物的头盖骨内时,这一话题将变得尤其敏感——被用于实验的动物是否会变得像人类一样聪明
目前,“混血赫迈拉”实验已经在美国研究界引发了巨大的[ ]争议,在更严格的规则制定出来前,科学研究到底会走到哪一步
如今的美国科学家和威尔士科幻小说《莫鲁博士岛》上炮制半人半兽怪物的医学狂人有什么本质区别

对“如今科学家发现这‘担心是真实的”理解有误的一项是( )。

A.科学家担心将猪器官移植到病人身上时也会把猪身上的病毒带进入体

B.“人猪赫迈拉”实验指出了医治某些人类疾病的奇妙方法

C.在医学上,能否将猪器官移植到病人身上的实验需要慎重考虑

D.猪体内的病毒可以通过人猪细胞的融合获得感染人类的途径