下列病变容易与胃平滑肌瘤作出鉴别诊断的是（）。 A.胃平滑肌肉瘤 B.胃溃疡 C.胃

下列叙述不符合化学史实的是（　　）

A．俄国化学家门捷列夫发现了元素周期律，并编制了第一张元素周期表

B．法国化学家拉瓦锡测定出了空气中所有成份的具体含量

C．首先提出分子概念的是意大利科学家阿伏加德罗

D．近代原子学说是由英国科学家道尔顿提出的

女孩，6岁，阵发性腹痛半年。查体：左腹部可触及肿块，表面光滑，囊性感。追问病史时有一次大量排尿后肿块缩小后又恢复原状史

术后症状消失但复查B超患肾仍轻度扩张，应采取的措施是（）

A.再次手术

B.肾盂肾盏穿刺造影

C.膀胱镜输尿管逆行造影

D.放射性核素肾扫描

E.随访观察

去括号：﹣2a²﹣[3a³﹣（a﹣2）]=(    )。

A

Insomnia is the inability to fall asleep or sleep restfully. It is a problem to nearly everyone at some time .A person may be awake for an hour in the middle of the night and then , next morning, feel that he hardly sleep all night Normally, worry about not getting enough sleep is the worst aspect of most insomnia. If insomnia is recurrent, however, it is important to find its causes and try to correct them, with the help of a doctor if necessary.

Any of a large number of simple factors may take it difficult for someone to fall asleep or remain asleep. His matters may be too soft or too hard. If there are too many blankets on a hot night, he may be too warm; if the bedclothes are too light he may feel cold during the night. If it is not dark enough, or too noisy, this may cause difficulty in sleeping. Eating shortly before going to bed also be responsible for insomnia. Stimulating drinks, such as tea or coffee, can also keep people awake.

Inability to fall asleep is sometimes a symptom of emotional or mental disorders. Insomnia may also be caused by pain and, very rarely, it can be a symptom of a physical disease.

The cause of insomnia may be easy to correct. The sufferer should check the mattress, bedclothes and bedroom temperature, and make any necessary changes. An eye mask keeps out the night and ear-plugs shut out sound. He should relax for an hour or two before bedtime, perhaps by reading a book; watching TV, or taking a warm bath. If he wakes during the night he should try turning on the light and reading for a while. Taking warm milk and a biscuit or two may be helpful. Above all, he should try not to worry about sleeplessness when someone is tied enough he nearly always falls asleep.

If necessary, a doctor may prescribe tranquillizers or sleeping pills. Take only the dosage he prescribes; any more is dangerous.

1. According to the writer, insomnia is ______.

[ A ] a rare problem                 [ B ] a sign of illness

[ C ] a common complaint            [ D ] a modern disease

2. People who have difficulty sleeping should sleep in_____.

[ A ] a light room                   [ B ] a dark room

[ C ] a cold room                   [ D ] a warm room

3. Insomnia need’t be taken seriously because_______.

[ A ] people can catch on sleep during the day.

[ B ] many people sleep far too much.

[ C ]it can easily be cured by doctors.

[ D ]it is cured naturally by tiredness.

4. The main cure for insomnia is_____.

[ A ] not to read too much at night

[ B ]not to eat too much for supper

[ C ] not to watch too much television

[ D ] not to get too anxious about sleeping

探究问题：

新中国成立以来，党和政府一直致力于完成祖国统一大业。 1995年，周恩来 * * 在亚非会议上的和平建议及在人大常委会上的报告，提出了和平解放台湾的对台工作方针。 1979年元旦，为了尽早解决台湾问题，实现祖国统一大业，全国人大常委会发表《告台胞书》，郑重宣告了和平统一祖国的大政方针。

（1）材料反映出党和政府对台方针发生了怎样的变化？

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（2）请结合所学的中外现代史相关知识，概述党和政府在1979年提出对台方针的背景。

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