对话填空共10小题；每小题1分，满分10分）
Olivea---O ; Pansy---P
O:Hi, it’s you, Pansy ! I didn’t 76 r_______ you ! 76
P:Hi, Olivea ! Long time no see. I’ve changed a lot, haven’t I ?
O:Yes, indeed. You’re 77 s________ than before. 77
P:Really ? I’m losing 78 w________. 78
O:But how ? Going on a 79 d_______ or … ? 79
P:I tried to eat less, but failed. You know I’ve got a sweet tooth.
Chocolates,icecreams… all my 80 f________. 80
O:So?
P:My doctor suggested that I do more exercise. You see, as a secretary to the
mamager, I always sit at the desk doing paperwork. 81 L______ of 81
exercise led to my 82g______ weight day by day. So at last, I followed 82
his advice. I’m 83 a_______ a Yoga(瑜珈 ) course regularly, 83
84 t_______a week. And I often do jogging in the evening. 84
O: Can you 85 i________your Yoga coach to me ? I’m quite interested in it. 85
P: Sure.
可知，正电荷从C到D，电场力做正功，所以C对。
可知，负电荷在C的电势能小于在D点的电势能，所以D错。