某县有35万人口，其中农村居民占90％，现欲作农村居民AIDS感染情况及其影响因素的

可出现幻觉、妄想症状的是（）。

A.癌症

B.脑外伤

C.疑病症

D.神经衰弱

E.抑郁症

There are two types of twins; identical and non-identical twins. Identical twins are formed from a single egg in mother’s body which divides to from two separate babies. Identical twins look the same, and are often dressed by their parents in clothes of the same colors. It is often difficult to tell identical twins from each other, even when they are standing side by side. Non-identical twins come into being when the mother produces two separated eggs a the same time, both of which grow to form babies. In this case the twins look like normal brothers and sisters and are easy to tell one from the other.

　　In the 1970s and 1980s a scientist did some research into twins. He invited many pairs of identical twins to university and asked them to take part in a week of tests. He was particularly interested in adopted (收养) twins who had been separated at birth. He would give the twins different kinds of tests to study their speed of thinking, their speech, their memory, the ways they saw and heard different things, and so on. Time and time again he found separated twins who preferred clothes of the same color, used the same kind of shaving soap, wore the same shaped square glasses and the same colored socks.

　　There is a third type of twins, but it is a very unusual one. Twins which are joined together at birth are known in western countries as Siamese twins.

小题1:It is difficult to tell identical twins apart because _______.

A．they are dressed in the same clothes

B．they are dressed in the same color

C．they are very alike

D．they are standing side by side小题2:If the twins are easy to tell from each other, they are ______.

A．very probably non-identical twins

B．surely identical twins

C．surely identical twins

D．always a brother and a sister小题3:Which of the following is NOT true according to this passage?

A．In the 1970s and 1980s a scientist did some research into the two main types of twins.

B．In the week of tests, he tested their speed of thinking, their speech, their memory and some other things.

C．There were twins who had been separated from each other as soon as they were born.

D．Very often, separated twins were found to choose things of the same kind, the same shape and the same color.小题4:This passage mainly tells us _______.

A．the main types of twins

B．what has been found out about twins

C．how twins are formed

D．how a scientist studied twins

上消化道出血特征性的表现为（）

A.失血性周围循环衰竭

B.呕血与黑便

C.失血性贫血

D.肠性氮质血症

E.网织红细胞持续升高

什么是土地使用权出让，转让合同公证？

职业道德的特点是（）。

A、在范围上，它存在于所有行业，与各种职业习惯的形成密不可分

B、在内容上，它具有很大的稳定性和连续性，能形成较稳定的职业心理和职业习惯

C、在范围上，它存在于从事一定职业的人中间，是家庭、学校教育影响下所形成的道德观念的进一步发展D、在形式上，它具有具体、多样和较大的适用性

E、在标准上，它具有具体、多样和较大的适用性