某公路上一钢筋混凝土简支梁桥，计算跨径14.5m，标准跨径15.0m，设计荷载为公路-I1级。主梁由多片T形梁组成，T形梁间距为1.6m，其一根T形梁截面尺寸如图10-21所示，该T形梁跨中截面弯矩标准值为：恒载作用=600kN·m，汽车荷载=280kN·m（含冲击系数），人群荷载=30kN·m。汽车荷载冲击系数μ=0.30。T形梁采用C30混凝土，HRB400级钢筋。a=75mm。 提示：按《公路桥涵设计通用规范》(JTGD60-2004)及《公路钢筋混凝土及预应力混凝土桥涵设计规范》(JTGD62-2004)解答。

该T形梁的有效翼缘宽度(mm)，与下列何项数值最为接近？

A:4800 B:4500 C:1720 D:1600

某箱形截面梁的平均尺寸如图18-17所示，混凝土强度等级为C40，年平均相对湿度RH=65%，加载龄期t=7d。

若=2.6300，当计算时刻的龄期t=17d时，则其徐变系数(t，t)，与下列何项数值最为接近？

A:0.7415 B:0.7551 C:0.7616 D:0.7718

化学降解法中，由于化学切割反应并非完全绝对的单一碱基特异性，因此除G,C残基外，A,T残基的位置需结合其他泳道的条带加以推断。

T残基的位置推断需结合的泳道是

A:T组 B:G+A组 C:G组和G+A组 D:C+T组 E:C组和C+T组

患者，女性，58岁，右眼视力下降3个月，伴眼痛3天。Vod HM／10cm，Tod 38mmHg，Vos 1．0，Tos 12mmHg，右眼混合充血，角膜透明，前房轴深3.5C．T．，房水（-），瞳孔6mmx6mm，色素外翻，虹膜面见新生血管，晶状体混浊，视盘轻度水肿，视网膜广泛火焰状出血，黄斑区水肿。左眼无充血，角膜透明，前房轴深3.5C．T．，房水（-），晶状体轻度混浊，眼底正常。

患者用药眼压控制不良，行小梁切除术。术后3天右眼拆除可调整缝线后眼压升高。Tod 32mmHg，右眼滤过泡轻度隆起，角膜透明，前房轴深1.5C．T．，中部至周边部前房消失。眼部B超未发现异常。诊断考虑

A:抗青光眼术后滤过泡渗漏 B:脉络膜出血 C:脉络膜脱离 D:恶性青光眼 E:以上都不是

某女性患者，45岁，因心悸就诊。查体，甲状腺右叶大小正常，左叶可触及一圆形结节，质地硬，约2cm×2cm，边界清楚，随吞咽活动，无血管杂音。T、T和TSH均正常。甲状腺显像呈热结节征象，结节周围及右叶甲状腺组织见轻度显影。

患者甲状腺素抑制试验显像见该热结节显像未见明显抑制，而结节周围和右侧甲状腺组织均不显影，如果T、T水平明显升高、TSH<0.01mIU／L。此时患者最可能的诊断是

A:Graves病 B:甲状腺癌 C:结节性甲状腺肿伴甲亢 D:甲状腺囊肿 E:Plummcr病 F:亚急性甲状腺炎

某女性患者，59岁，右眼视力下降3个月，伴眼痛3天。Vod HM／10cm，Tod 38mmHg，Vos 1．0，Tos 12mmHg，右眼混合充血，角膜透明，前房轴深3.5C．T．，房水（-），瞳孔6mm×6mm，色素外翻，虹膜面见新生血管，晶状体混浊，视盘轻度水肿，视网膜广泛火焰状出血，黄斑区水肿。左眼无充血，角膜透明，前房轴深3.5C．T．，房水（-），晶状体轻度混浊，眼底正常。

患者用药眼压控制不良，行小梁切除术。术后3天右眼拆除可调整缝线后眼压升高。Tod 32mmHg，右眼滤过泡轻度隆起，角膜透明，前房轴深1.5C．T．，中部至周边部前房消失。眼部B超未发现异常。诊断考虑

A:抗青光眼术后滤过泡渗漏 B:脉络膜出血 C:脉络膜脱离 D:恶性青光眼 E:以上都不是

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：

Each day the men ran for approximately eight hours.

A:Right B:Wrong C:mentioned

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：

In the middle of the day: the men usually stopped running.

A:Right B:Wrong C:mentioned

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

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：

On their trip across the desert: the three men ran through five countries.

A:Right B:Wrong C:mentioned