某男性患者，49岁，主诉：进行性吞咽困难4月。患者4年月出现咽异物感，外院曾诊断为慢性咽炎治疗，咽异物感无改善，并出现吞咽不畅，开始时，尚可进食软饭，此后出现吞咽困难，并加重，现仅可进食流质，起病后体重下降5kg。无声嘶、无饮水呛咳。吸烟30年，40支/日。嗜白酒，半斤/日。体查：右侧梨状窝饱满，菜花样肿物，大小约3cm×1cm。双侧声带活动正常、表面光滑。右颈Ⅱ、Ⅲ区扪及2个肿大淋巴结、质中、界欠清、活动度一般、大小约3cm×1cm、2cm×0..5cm。纤维喉镜下喉咽肿物活检，病理证实为梨状窝高分化鳞癌。喉咽及食管造影示：右侧梨状窝占位累及食管入口。胸片及腹部B超未见异常。全身骨扫描未见异常。

根据2002年UICC分期，患者术前的T、N、M临床分期正确的是

A:T B:T C:T D:T E:N. F:Na G:Nb H:Nc I:N J:M.

n≥40且T≥5时χ值的专用公式是

A: B: C: D: E:

n≥40且1值的计算公式是

A: B: C: D: E:

四格表资料中的实际数与理论数分别用A与T表示，其基本公式与专用公式求χ2的条件为:

A:A≥5 B:T≥5 C:A≥5且T≥5 D:A≥5且n ≥40 E:T≥5且n≥40

Across the Deserts

　　The SaharaDesertis the largest desert in the world. It stretches across Africa fromSenegaltoEgypt. TheSaharaDesertis an unfriendly environment. During the day it"s very hot, and at night it’s sometimes very cold. It is also difficult to find water in theSahara.

　　In 2006, Kevin Lin, Ray Zahab, and Charlie Engle decided to do something very difficult. They made the decision to run across the Sahara Desert 4,300 miles (6,920km). It seemed impossible to do, but they wanted to try. The three men liked to test themselves, and this would be a very big test.

　　On the morning of November 2, Kevin, Ray, and Charlie started their trip across theSahara. Every morning they began running at 5:00. At11 a.m. they stopped and rested until 5 p.m. Then they ran again until 9:30 in the evening. Each day they ran about 40 miles (64 km). Every day it was the same thing. They got up and ran. They listened to music on their iPods, and they ran and ran.

　　Kevin, Ray, and Charlie needed to eat a lot of food during their trip. Most people need about 2,000 calories of food each day. Kevin, Ray, and Charlie needed between 6,000 and 9,000 calories every day. That"s a lot of food! They also needed to drink a lot of water.

　　The three men had some problems on their trip, and many times they wanted to quit and go home. It was often very hot (140°F/60°C) during the day, and the heat made them sick. Their legs and feet hurt. Sometimes it was very windy, and they couldn"t see. One time they got lost. But they didn"t quit. After 111 days, Kevin, Ray; and Charlie successfully finished their trip across theSaharaDesert. They hugged each other and put their hands in the water of theRed Sea. Then they ran to a hotel to take a long shower.

　　词汇：

　　Stretch / strɛtʃ / v. 延伸，伸展

　　Calorie / "kælərɪ / n. 卡(路里)，小卡，大卡

　　Quit / kwɪt / v. 停止，放

　　注释：

They sometimes felt sick because it was so hot.

A:Right B:Wrong C:mentioned

在四格表的x²检验中，若1≤T＜5且n＞40时应选用（）。

A: B: C: D: E:

四格表资料中的实际数与理论数分别用A与T表示，其基本公式与专用公式求χ2的条件为（）

A:A≥5 B:T≥5 C:A≥5且T≥5 D:A≥5且n≥40 E:T≥5且n≥40

某指令流水线由5段组成，第1、3、5段所需时间为Δt，第2、4段所需时间分别为3Δt、2Δt，如图示，那么连续输入n条指令时的吞吐率(单位时间内执行的指令个数)TP为（）

A:n/[5×(3+2)Δt] B:n/[(3+3+2)Δt+3(n-1)Δt] C:n/[(3+2)Δt+3(n-3)Δt] D:n/[(3+2)Δt+5×3Δt]