题目

根据短文内容及所给提示，在文中的空白处填写一个正确的单词。This week we learnt a lot about science. We also did a lot of 36.e【1】 in science classes. We all like them because they are so 37. f【2】. We concluded some theories in 38.【3】 (science) methods. We know science affects our life. The 39. 【4】 (develop) of technology has greatly changed our life. Radios, TV, computers, faxes and satellites make people close 40.【5】 each other. We can see nearly everything happening 41.【6】 (thousand) of miles away. And we can communicate with people in diffe如图，已知⊙O的半径为5，锐角△ABC内接于⊙O，BD⊥AC于点D，AB=8，则tan∠CBD的值等于A.B.C.D.