题目内容
It remains to be seen ______ the newly formed committee’s policy can be put into practice.
A. that B. which C. what D. whether
D。本题考查名词性从句中的主语从句。It是一个形式主语，空处之后是一个主语从句做真实主语，从主句部分看，既然是“有待观察”，那就说明主语部分不是一个事实，而是一个问题，不能用that，排除选项A；主语从句部分是一个完整的句子，不缺少成分，而which 和what在主语从句总都是要充当成分的，排除选项B，C。
名校课堂系列答案Since the beginning of history, man has been attracted by the idea of living forever, of winning the fight against death and disease. So far, this has only remained a dream. Many people have wondered whether it would be possible to find a way to preserve human bodies, and what would be the best way.
It has long been known that meat of fruit can be kept fresh for long periods by freezing; in ancient China, for example, food was stored with ice to keep it fresh. This method could also be useful for preserving humans.
However, most living beings that exist under warm conditions die when frozen. This is because of the harmful effects of freezing ice crystals(晶体), which not only are larger than the volume(体积) of the water originally in the cells, but also form sharp cutting shapes that harm the cells.
In the 1940s Dr B.J. Luyet and a group of scientists in England were working on the problem of freezing cells without damaging them. Since the harm caused by ice crystals was the main cause of damage, Luyet suggested removing some or all of the water from the cells before freezing them.
Using living cells form chicken, Luyet and his assistants discovered that they could partly dry the chicken cells, using a mixture of the white part of an egg and glycerin (丙三醇). Some success was obtained. The chicken cells were dried, frozen for a period of time, and then carefully unfrozen. Almost all the cells recovered when they reached normal temperatures.
Since then, the cooling of whole animals to a temperature far below freezing point for later unfreezing has become more of a possibility, and the glycerin method would probably be used to accomplish this. When this can be done completely and successfully, science will have moved much closer to its aim of freezing and storing incurable patients until the day they can be cured.
【小题1】What does the passage mainly talk about?
| A．Easy but practical ways to remove water from living cells. |
| B．The possibility of preserving human bodies by freezing. |
| C．The practice of preserving food by freezing. |
| D．The harmful effects of freezing. |
| A．has already been realized |
| B．was invented in ancient China |
| C．has its roots in the way of storing food |
| D．is widely accepted by the scientific world |
| A．is harmful to living cells |
| B．is the best way of preserving food |
| C．reduces the volume of water in living cells |
| D．is a way of removing water from living cells |
| A．It is impossible to have whole animals frozen. |
| B．It remains unknown how to unfreeze frozen animals. |
| C．Freezing incurable patients for later treatment is still an idea. |
| D．The glycerin method has already been adopted to treat patients. |
This robot is supposed to save a lot of labor, but it remains a problem if it ______.
|
A．is |
B．saves |
C．does |
D．has |