堤防加固工程可分为水上护坡及水下护脚两部分。两者一般以( )为界划分。 A.校核洪 发布时间:2018-01-04 00:45 │ 来源:www.tikuol.com 题型:单项选择题 问题: 堤防加固工程可分为水上护坡及水下护脚两部分。两者一般以( )为界划分。A.校核洪水位 B.设计洪水位C.设计枯水位 D.常年水位
题型:单项选择题 阅读理解。Welcome to the 2012 London Olympic Games!Archery Archery has a 10,000 year history, when bows and arrows were first used forhunting and war. Archery first appeared at the Paris Olympics of 1990. It was removed after 1908 and only returned to the Olympics at Munich in 1972. Did you know? In the 14th century, archery was so important that as English law required every man, aged seven to 60, to practise it. Badminton This sport was invented by British soldiers in India who called it Poono, the same name as the town in which they lived. It was first played at the Olympics in 1992 at Barcelona. Although the rules of the modern sport were developed in England, Asian countries are now the best.Did you know? The best balls are said to be made fromthe feathers of the left wing of goose.Football There are two medal competitions for Olympic football, one for men's teamsand one for women's. Football was first played at the 1908 Olympic Games and it has been played at every Olympic Games ever since, except for Los Angeles 1932. Did you know? Hungary has won three football gold medals-more than any other country.TaekwondoThis Korean sport's name means"the way of the hand and foot". The players getpoints by hitting each other with these two parts of the body only. The playersmustn't lie on the floor and no equipment can be used. Taekwondo first appeared at the 2000 Sydney Games.Did you know? Over 60 million people from 190 countries around the world regularly take part in this sport. 1. Who invented the sport of badminton? A. Indians. B. British. C. Chinese.D. Koreans. 2. Which of these sports appeared earliest at the Olympics? A. Archery. B. Badminton. C. Taekwondo. D. Football. 3. Which sport was first named after a town? A. Badminton.B. Football. C. Taekwondo.D. Archery. 4. Which of the following picture shows the sport of"Taekwondo"? A B C D5. Where can you most probably find web page? A. Sydney 2000.com B. Beijing 2008.com C. Guangzhou 2010.com D. London 2012.com 查看答案
题型:单项选择题 现有无水硫酸铜、食盐、熟石灰、干冰、纯碱、烧碱五种物质,用它们的化学式填空:(1)生活中常用作调味剂的是______; (2)可以用于湿法冶金的是______;(3)常用作家庭洗涤剂的是______; (4)可以用来改良酸性土壤的是______;(5)易吸水潮解的固体______; (6)固体可用于人工降雨的是______. 查看答案
题型:单项选择题 从学生选课信息表中找出无成绩的元组的SQL语句是( )。A.SELECT*FROM sc WHERE grade=NULLB.SELECT*FROM sc WHERE grade IS"C.SELECT*FROM sc WHERE grade IS NULLD.SELECT*FROM sc WHERE grade=" 查看答案