重症肌无力胆碱能危象是由于 A．抗胆碱酯酶药物过量 B．抗胆碱酯酶药物过敏 C．抗胆

若平行四边形的一边长为5，则它的两条对角线长可以是（　　）

A．12和2

B．3和4

C．4和6

D．4和8

患儿，6个月，早产儿，出生体重2200g，母乳喂养，现体重8kg，家长发现孩子多汗、夜惊，体检患儿前囟大、方头、肋串珠。

最可能的诊断是（）

A.先天性甲状腺功能低下

B.软骨发育不良

C.维生素A缺乏

D.维生素D缺乏性佝偻病

E.营养不良

A small piece of fish each day may keep the heart doctor away. That’s the finding of a study of Dutch men in which deaths from heart disease were more than 50 percent lower among those who consumed at least an ounce of salt water fish per day compared to those who never ate fish.

The Dutch research is one of three human studies that give strong scientific support to the long held belief that eating fish can provide health benefits, particularly to the heart.

Heart disease is the number-one killer in the United States, with more than 550,000 deaths occurring from heart attacks each year. But previous research has shown that the level of heart disease is lower in cultures that consume more fish than Americans do. There are fewer heart disease deaths, for example, among the Eskimos of Greenland, who consume about 14 ounces of fish a day, and among the Japanese, whose daily fish consumption averages more than 3 ounces.

For 20 years, the Dutch study followed 852 middle-aged men, 20 percent of whom ate no fish. At the start of the study, average fish consumption was about two-thirds of an ounce each day, with more men eating lean fish than fatty fish.

During the next two decades, 78 of the men died from heart disease. The fewest deaths were among the group who regularly ate fish, even at levels far lower than those of the Japanese or Eskimos. This relationship was true regardless of other factors such as age, high blood pressure, or blood cholesterol（胆固醇）levels.

小题1:The passage is mainly about _________.

A．the high incidence of heart disease in some countries

B．the changes in people’s diet

C．the effect of fish eating on people’s health

D．the daily fish consumption of people in different cultures小题2:We can infer from the passage that there are fewer heart disease deaths ________.

A．in countries of the yellow-skin race

B．in highly-developed countries

C．in the countries with high consumption of fish

D．in the countries with good production of fish小题3:The phrase “this relationship” in paragraph 6 refers to the connection between _________ and the level of heart disease.

A．the amount of fish eaten

B．regular fish-eating

C．the kind of fish eaten

D．people of different areas小题4:From the passage we know the author is most probably ______.

A．a heart doctor

B．a science researcher

C．a supporter of healthy eating

D．a university student

第九组：
患者，男性，上腹部不适，食欲不振三个月。一月来出现黄疸进行性加重，有体重减轻，全身明显黄染，肝未触及，深吸气时可触及肿大的胆囊底部，无触痛。化验：血胆红素15mg/dl，尿检：胆红素阳性。

患者术后半年，出现黄疸，超声提示肝内多发病灶，最有可能的是

A．肿瘤复发伴肝转移

B．胆管结石

C．胆管癌

D．门静脉炎

E．肝癌

李某与某开发公司订立了商品房买卖合同，后发现开发公司在签订合同时提供的《商品房预售许可证》是假的，因此，该合同属于（）合同。

A.有效

B.无效

C.可撤销

D.效力待定