【单选题】A new way of teaching _____ in the article can make learning easier.
【单选题】The colourful illustrations included in the new edition of the book make it______attractive.
【单选题】The purpose of technology is to make it easier, ______ it more difficult.
【单选题】In ___ way, this book is far easier than ___ one I read in the library.
【简答题】如图1所示,已知二次函数y=ax 2 -6ax+c与x轴分别交于点A(2,0)、B(4,0),与y轴交于点C(0,-8t)(t>0). (1)求a、c的值及抛物线顶点D的坐标(用含t的代数式表示); (2)如图1,连接AC,将△OAC沿直线AC翻折,若点O的对应点O′恰好落在该抛物线的对称轴上,求实数t的值; (3)如图2,在正方形EFGH中,点E、F的坐标分别是(4,-4)、(4,-3),边HG...
【单选题】The author writes this passage to ______.
A.
discuss the negative aspects of being attractive
B.
give advice to job seekers who are attractive
C.
demand equal rights for women
D.
emphasize the importance of appearance
【单选题】在牙周膜的功能中,属于连接牙和牙槽骨、调节和缓冲牙受到的各种压力的是