肠结核（）
A.病变主要位于回盲部
B.病变主要位于直肠和乙状结肠
C.病变多位于回肠远段
D.病变以全结肠弥漫性改变为主
E.病变不可能位于空肠
参考答案：A
解析：肠结核主要位于回盲部，其次依次为升结肠、空肠、横结肠、降结肠、阑尾、十二指肠和乙状结肠。克罗恩病同时累及回肠末段与邻近右侧结肠者为多见，只涉及小肠者占其次，少数见于空肠，病变呈节段或跳跃性分布。
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| Some day little cars may take the place of today's cars. If everyone 1 such alittle carin the future, there will be less pollution in the air, there will be more parking spaces in cities, and the streets will be 2 crowded. The space now for one car of the usual size can hold 3 one such little car. The little cars will 4 muchless to own and to drive.Driving will be 5 ,too,because these little cars can go only 50 kilmetres an hour. The cars of the future will be fine for going 6 the city,but they will not be useful for going far away. The little car needs only two batteries(电池)-ore battery for the motor, and 7 for the horn and the rights. If we still 8 the big cars along with the small ones,we will need to 9 two kinds of roads. Some roads will be used 10 the big fast cars,and other roads will be needed for the small,slower ones. | ||||
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