吸收不良综合征可引起（） A.心源性水肿 B.黏液性水肿 C.肝源性水肿 D.营养不

阅读理解。

Traditional Chinese festivals are now getting their own logos (标识). Here're logos for China's seven important traditional festivals.      Chunjie, Spring Festival, China's lunar new year, is the most important of the traditional Chinese holidays. People usually get together, watch fireworks and the lion dance, eat dumplings and put on new clothes. They pay New Year calls to their relatives and friends. Children usually get red packets.      Yuanxiao, Lantern Festival is on the 15th day of the first month in the Chinese calendar. People watch lanterns and eat sweet dumplings.      Qixi, the Night of Sevens is on the seventh day of the seventh month in the Chinese calendar. It's Chinese version (版本) of Valentine's Day (情人节).      Qingming, Tomb-Sweeping Festival is around April 5. People from home and abroad go to the graves (墓) of the dead in memory of (纪念) them.      Zhongqiu, Mid-Autumn Festival, is on the 15th day of the eighth month in the Chinese calendar. Families enjoy moon cakes and tell the story of Chang'e.     Duanwu, Dragon Boat Festival is on the fifth day of the fifth month in the Chinese calendar. People eat rice dumplings and remember the poet Qu Yuan.      Chongyang, Double Ninth Festival is on the ninth day of the ninth month in the Chinese calendar. It's the date to pay respect (尊敬) to the old.

1. Mid-Autumn Festival is ________ in the Chinese calendar.

A. on 15th of August B. on 7th of July C. on 15th of January D. on 5th of May

2. What do Chinese people eat at Dragon Boat Festival?

A. Dumplings. B. Moon cakes. C. Rice dumplings. D. Sweet dumplings.

3. Chinese version of Valentine's Day is ________.

A. Lantern Festival B. the Night of Sevens C. Spring Festival D. Tomb-Sweeping Festival

4. At Tomb-Sweeping Festival, people go to the graves in memory of ________.

A. Qu Yuan B. the elderly C. Chang'e D. the dead

5. At Double Ninth Festival, what do people usually do?

A. They watch lanterns. B. They pay respect to old people. C. They visit their relatives. D. They get together to tell stories

如图所示，底座A上装有长0.5m的直立杆，总质量为1kg，用细线悬挂，底座底面离水平地面H=0.2m，杆上套有质量为0.2kg的小环B，它与杆间有摩擦，设环与杆相对滑动时摩擦力大小始终不变，环从底座以

15

m/s的初速度沿杆向上运动，最后恰能到达杆的顶端（取g=10m/s²）．求：

（1）环沿杆上滑过程中的加速度大小；

（2）在环上滑过程中，细线对杆的拉力大小；

（3）若小环在杆顶端时细线突然断掉，底座下落后与地面立即粘合后静止，整个过程杆没有晃动，则线断后经多长时间环第一次与底座相碰？

由以上数据统计图，试估计每台电视的销售价是多少元（）

A．450

B．500

C．530

D．600

美国能源部长比尔·理查今天宣布，一项重要的技术突破将会使柴油发动机以更加清洁有效的方式工作．这项实验室新技术产生于两年来对一种能同时降低碳氢化合物浓度和氮氧化合物排放量的机车柴油发动机的研究．它还能提高发动机功率．柴油机是效率最高的内燃机，但它们也是严重的污染源．传统上控制柴油机内碳氢化合物微粒浓度会导致氮氧化合物排放量增加，反之亦然．但是，阿尔贡联邦科学实验室的科学家在通用汽车公司电动部以及美国铁路协会的协助下，能够同时减少烟气和氮氧化合物的排放量．氮氧化合物是破坏臭氧的原始物质，也是引起烟雾的重要因素．研究人员发现，改变燃料、氧气浓度以及柴油机工作状况最终改善了燃烧过程，并同时降低了两种物质的排放量．通用汽车公司电动部工程师凯利·琼斯说，这项新技术可以在卡车和汽车上使用．阿尔贡联邦科学实验室主管发动机和排放研究工作的沙伊·谢卡尔说，这项技术的独特之处在于，它是一种“预处理方法，而不是后处理方法．它处理发动机内部的空气．”

对文中“反之亦然”的含义理解正确的一项是()

A．降低碳氢化合物微粒浓度，就会减少氮氧化合物的排放量

B．提高碳氢化合物微粒浓度，也会增加氮氧化合物的排放量

C．增加氮氧化合物排放量，也会增加烟气排放量

D．减少氮氧化合物排放量，就会减少烟气排放量

木材是各向异性材料，在下述强度的比较中，正确的是（）

A.顺纹抗压>顺纹抗拉

B.顺纹抗拉>顺纹抗压

C.顺纹抗拉>横纹抗拉

D.抗弯>抗剪

E.抗弯>横纹抗拉