问题 填空题

设(x2+y2)(x2+y2+2)-15=0,则x2+y2的值为______.

答案

设t=x2+y2,则原式可化为t2+2t-15=0,

∴t=x2+y2=3或t=x2+y2=-5,

又∵t≥0,

∴x2+y2=3.

完形填空
My two-year-old daughter Kate wanted a dog. But I was too busy to buy one. One day, Kate ran in, shouting, “Mom! Come to see my dog!” Her face was red with __36__.
I followed her to the bush and found a __37__! He was hurt. Seeing me, he stood up __38__!
I could see his teeth! God! My mouth felt __39__. “Don’t be afraid. That’s mom. She loves you, too.” Kate said. Then he became friendly. It was __40__!
I __41__to find my husband and told him about the wolf. We should have killed the wolf, __42__Kate loved him. Besides, he was gentle to Kate. So we called the vet(兽医)finally.
Kate named the wolf Ralph __43__ she carried food to him every day. Later, Ralph got well. They played together in the daytime. At night, Ralph would return to the mountains. Sometimes he __44__but came back several days later.
On Kate’s first day of school, we could see Ralph’s __45__. After the school bus left, Ralph lay by the side of the road and __46__. When Kate returned, he got happy again. This __47__throughout Kate’s school years.
Twelve __48__passed.
One day we heard that a she-wolf was killed. The other wolf was hurt and ran away. We were__49__about Ralph. That night, Ralph returned with a wound(伤口). Sixteen-year-old Kate held his head and __50__him. We hope he could come through. However, he __51__.
Kate cried. I noticed something strange in the bush-----two little yellow eyes! Ralph’s __52__! Before he died, Ralph __53__his child to us ! He knew he would be __54__here, as he had been. Ralph, Ralph... I was __50__.
“Don’t be afraid, little...Ralphie. That’s mom. She loves you, too.”
小题1:
A.encouragementB.entertainmentC.excitementD.agreement
小题2:
A.dogB.foxC.wolfD.tiger
小题3:
A.suddenlyB.finallyC.slowlyD.patiently
小题4:
A.hurtB.dryC.warmlyD.cold
小题5:
A.wonderfulB.unhappyC.unbelievableD.normal
小题6:
A.preparedB.rushedC.pretendedD.wanted
小题7:
A.howeverB.soC.thoughD.but
小题8:
A.andB.butC.soD.or
小题9:
A.disappearedB.turnedC.passedD.came
小题10:
A.sadnessB.dreamC.understandingD.anger
小题11:
A.sleptB.leftC.sangD.waited
小题12:
A.stoppedB.joinedC.livedD.continued
小题13:
A.yearsB.weeksC.monthsD.days
小题14:
A.surprisedB.hopefulC.worriedD.careful
小题15:
A.comfortedB.beatC.washedD.struck
小题16:
A.succeededB.diedC.criedD.woke
小题17:
A.motherB.fatherC.childD.wife
小题18:
A.postedB.broughtC.gaveD.threw
小题19:
A.happilyB.safeC.warmD.friendly
小题20:
A.confusedB.frightenedC.disappointedD.moved
单项选择题 案例分析题

患者男,26岁,因“急性阑尾炎术后9d,腹泻、发热6d,气促6h”入ICU。9d前因急性阑尾炎行手术治疗,术中发现阑尾坏死、穿孔,腹腔内有大量脓性液体,手术切除坏死阑尾,并给予大量0.9%氯化钠溶液冲洗腹腔。术后患者体温波动在37~39℃,予抗感染治疗。术后第3天患者出现黄绿色稀水便,每次100~300ml,每天10~15次。腹部超声:肠间和肝下有少量液性暗区。考虑为术后腹腔感染,继续抗感染治疗。术后第7天粪培养为金黄色葡萄球菌,考虑菌群失调,停用抗生素。但患者仍发热、腹泻,并在术后第9天出现呼吸急促,为进一步治疗收入ICU。既往体健。查体:T38.5℃,P100次/min,R30次/min,BP105/60mmHg;双肺呼吸音清,心律齐,未闻杂音;腹软,手术切口愈合好,伤口周围有压痛,移动性浊音(-),肠鸣音活跃(7次/min)。血常规:WBC14×109/L,N0.88,Hb140g/L,PLT300×109/L。粪常规:球杆比例为6︰4。血电解质:Na+128mmol/L,K+3.0mmol/L。BG5.5mmol/L。肾功能正常;肝功能:ALT、AST正常,总胆红素67μmol/L,直接胆红素31μmol/L,总蛋白67g/L,清蛋白31g/L。普通面罩吸氧(氧流量4L/min),血气分析:pH7.45,PaCO234mmHg,PaO290mmHg,BE2mmol/L,血糖9mmol/L。ECG:窦性心动过速。胸部X线片:无明显异常。

患者目前腹泻最可能的原因是()

A.腹腔感染引起肠蠕动增加

B.抗生素相关菌群失调

C.电解质紊乱

D.不全肠梗阻

E.急性细菌性痢疾

F.手术致肠道功能紊乱