Velocities of up to 4.2 m/s (14 fps) and corresponding shear stresses of up to 480 N/m2 (10 psf) are achieved at the maximum discharge of 1.7 m3/s (60 cfs). Detailed information on the design criteria, selection of materials and construction methods is discussed. Unique features of ...
Unit 3 Look at me 第三课时 课前准备 1. 写有大小写Ee,Ff, Gg, Hh, Ii的字母卡 2. 写有本课单词的单词卡 3. 教材相配套的教学录音带 4.本课时教学内容的录音带。 5. 教师准备Sarah, Mike, Mike’s mother, Wu ...