若大圆的半径和小圆的直径相等，则大圆的直径和小圆的直径的比是[ ] A．4：1 发布时间：2017-06-17 23:30 │ 来源：www.tikuol.com 题型：选择题 问题： 若大圆的半径和小圆的直径相等，则大圆的直径和小圆的直径的比是[ ]A．4：1B．2：1 C．1：1
题型：选择题 完形填空。 As soon as he finished his homework. Eric jumped onto his bicycle and rode off in the direction of the beach. While he was 1 along. He thought about the whales (鲸鱼). He hoped he would see them again today. After he got to the beach. Eric 2 his bicycle behind a bush so that no one could see it from the road. Then he ran down onto the sand. 3 it was only four in the afternoon,the sky was already growing dark. Eric frowned (皱眉). If it 4 he wouldn't be able to see the whales because they would stay in deeper water. He hurried along the beach 5 the rocks. They were the best place to watch the whales from because of their 6 . Before Eric reached the rocks he felt a drop of water on his head. "Oh, no!" he thought. "Now the whales will stay in the deep water and I won't be able to 7 them!" But just then he saw a large shape on the beach. It was a young whale! The whale had come too close to the shore (海岸) and got stuck(搁浅) on the 8 ! At first the whale didn't move at all and Eric thought it was 9 . Then he saw its tail move weakly. Eric turned and ran through the rain as fast as he could back to his bicycle. He had to get 10 ! Unless they got the whale back in the water soon,it would die and Eric couldn't let that happen. ( )1. A. riding ( )2. A. sent ( )3. A. As ( )4. A. shone ( )5. A. into ( )6. A. length ( )7. A. watch ( )8. A. soil ( )9. A. dead ( )10. A. care B. running B hid B. Since B. snowed B. off B. size B. kill B. beach B. pretty B. water C. getting C. look C. Because C. rained C. to C. height C. catch C. grass C. lovely C. medicine D. walking D. got D. AlthoughD. blew D. from D shape D. save D. water D alive D. help 查看答案
题型：选择题 钢筋绑扎接头的位置应相互错开，从任一绑扎接头中心至搭接长度的1.3倍区段范围内，有绑扎接头的受力钢筋截面面积占受力钢筋总截面面积的百分率，在受拉区中不得超过：（）A.25%B.30%C.40%D.50% 查看答案