=3.14×1.5×300×60,
=84780(米);
答:每小时可行84780米
树立自我新形象,就要( )①像明星一样生活,完全效仿他们 ②了解自己的个性特点与潜能,确立个人成才的目标③善于学习他人的优点和长处,不断完善自我 ④努力学习科学文化知识,加强道德修养
⑴Open the door, please. ____ A.
⑵Close the window, please. ____ B.
⑶Open the window, please. ____ C.
⑷Close the door, please. ____ D.