默写① ,道阻且长。(《蒹葭》)② ,思而不学则殆。(《先秦诸子论学八则》)③ ,往来无白丁。(《陋室铭》)④ ,仁也; ,义也;恭敬之心,礼也;是非之心,智也。(《先秦诸子论德八则》)
句子配对。
①How heavy is Tom?____ A. There are 15.
②How old is he?____B. He is 15years old.
③How much is the robot?____C. He weighs 51kg.
④How many boys are there under the tree?____D. It's September 15th.
⑤When is your birthday?____E. It's ¥15.
Since the reform and opening-up, great changes have ____ ____ in our hometown.
如图所示的泉州湾大桥于2015年5月12日正式通车,其跨海大桥长12.45km,最高限速100km/h,若某小汽车以最高限速在此桥上匀速行驶时,受到的阻力为2000N,乘员的平均质量为60kg,小汽车的部分参数如表,求
空车质量
1600kg
满载人员
5人
满载时轮胎与地面接触总面积
0.08m2
电动机额定电压
48V
求: