静脉血氧饱和度为（） A.19mL/dL B.14mL/dL C.95%～97% D

对个别学生的教育（　）。

A．就是要靠班主任

B．就是要靠集体活动来教育

C．是同集体教育相辅相成的

D．主要是对较差学生的教育工作

甲于2005年1月向乙借款7万元，借款期限为4个月，利息比照银行同期借款利率，二人签订了借款合同。3月， 甲将自己居住的房屋送给了丙，并办理了房屋登记过户手续。4月，丙为了从事地板生意向丁银行贷款10万元，并以甲送给的住房作为还款抵押担保，并办理了抵押登记。甲、乙签订的借款合同到期后，乙发现甲已经没有财产可供执行。于是，乙向法院起诉，要求甲清偿欠款。 问： (1)乙应当如何维护自己的权益为什么 (2)如果丙到期不能清偿丁银行的债务，丁银行是否有权实现抵押权为什么 (3)如果丁银行主张实现抵押权，本案应如何处理为什么

一个社会的婴儿死亡率通常标志着这个社会的一般健康水平。虽然在美国的部分地区婴儿死亡率比发展中国家还要高，但从美国全国的总体比率来看，婴儿死亡率一直是持续下降的。不过，这种婴儿死亡率的下降却不足以表明美国现在的婴儿在出生时的一般健康水平比以前好。 以下哪项如果为真，能对上面的矛盾现象提出最好的解释( )

A．作为总体比率的婴儿死亡率的数字掩盖了个别地区的缺陷

B．美国半数以上婴儿死亡的原因是由于出生时体重不足

C．在美国，医疗技术已经有了很大的发展，足以挽救早产和体重不足的婴儿，这些婴儿需要在医院里延长寿命

D．婴儿没有得到抚养者精心的照料，从而影响了他们的成长，并且使他们的体重增长缓慢

Every newborn baby is dealt a hand of cards which helps to determine how long he or she will be allowed to play the game of life. Good cards will help those who have them to have a long and healthy existence, while bad cards will bring to those who have them terrible diseases like high blood pressure and heart disease. Occasionally, cards are dealt out that doom their holders to an early death. In the past, people never knew exactly which cards they had been dealt. They could guess at the future only by looking at the kind of health problems experienced by their parents or grandparents.

Genetic testing, which makes it possible to find dangerous genes, has changed all this. But, until recently, if you were tested positive for a bad gene you were not obliged to reveal this to anyone else except in a few extreme circumstances. This month, however, Britain became the first country in the world to allow life insurers to ask for test results.

So far, approval has been given only for a test for a fatal brain disorder known as Huntington’s disease. But ten other tests (for seven diseases) are already in use and are awaiting similar approval.

The independent body that gives approval, the Department of Health’s genetics and insurance committee, does not have to decide whether the use of genetic information in insurance is ethical. It must judge only whether the tests are reliable to insurers. In the case of Huntington’s disease the answer is clear-cut. People unlucky enough to have this gene will die early, and cost life insurers dearly.

This is only the start. Clear-cut genetic answers, where a gene is simply and directly related to a person’s risk of death, are uncommon. More usually, a group of genes is associated with the risk of developing a common disease, dependent on the presence of other genetic or environmental factors. But, as tests improve, it will become possible to predict whether or not a particular individual is at risk. In the next few years researchers will discover more and more about the functions of individual genes and what health risks — or benefits — are associated with them.

Which of the following statements is true according to the text（）

A. Genes may contribute to some common diseases

B. Environmental factors cause more diseases than genes

C.It is common that most fatal diseases are caused by genes

D. It is impossible to get clear-cut genetic answers

对于底座已安装好水泵和电动机的小型机组，可不拆卸而直接投入安装。( )