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患者男，40岁，间歇性中上腹痛1年，程度轻，可自行缓解。上腹痛再发10h，病前进食特辣火锅，腹痛逐渐加重不缓解，恶心，8h前曾排黄色成形便1次。查体：T37℃，P80次/min，R14次/min，Bp110/70mmHg。步入诊室，轻度脱水貌，全身皮肤、黏膜无黄染及淤点。双肺呼吸音正常，未闻及干、湿啰音，心率80次/min，律齐，无杂音。腹平软，上腹轻度压痛，无反跳痛，肝、脾不大，未闻及肠鸣。

需要考虑的诊断是（）。

A.急性胃肠炎

B.急性阑尾炎

C.急性胰腺炎

D.急性胆囊炎

E.消化性溃疡

答案

参考答案：B, C, D, E

单项选择题

设三元二次型f(x1，x2，x3)=XTAX的正惯性指数p=1，且二次型A满足A2+2A-3E=0，则在正交变换下该二次型的标准形是______．

A．


B．


C．


D．
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单项选择题

For the people who have never traveled across the Atlantic the voyage is a fantasy. But for the people who cross it frequently one crossing of the Atlantic is very much like another, and they do not make the voyage for the (56) of its interest. Most of us are quite happy when we feel (57) to go to bed and pleased when the journey (58) . On the first night this time I felt especially lazy and went to bed (59) earlier than usual. When I (60) my cabin, I was surprised (61) that I was to have a companion during my trip, which made me feel a little unhappy. I had expected (62) but there was a suitcase (63) mine in the opposite corner. I wondered who he could be and what he would be like. Soon afterwards he came in. He was the sort of man you might meet (64) , except that he was wearing (65) good clothes that I made up my mind that we would not (66) whoever he was and did not say (67) . As I had expected, he did not talk to me either but went to bed immediately.
I suppose I slept for several hours because when I woke up it was already the middle of the night. I felt cold but covered (68) as well as I could and tried to go back to sleep. Then I realized that a (69) was coming from the window opposite. I thought perhaps I had forgotten (70) the door, so I got up (71) the door but found it already locked from the inside. The cold air was coming from the window opposite. I crossed the room and (72) the moon shone through it on to the other bed. (73) there. It took me a minute or two to (74) the door myself. I realized that my companion (75) through the window into the sea.

A. It was no one B. There was no one
C. It was anyone D. There was anyone
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