题目

完形填空 Mrs. Black is in the supermarket. She is 1 some gifts for the Browns. The Browns movedinto a new house. Yesterday Mrs. Black got their housewarming invitation, andshe 2 it. Mrs.Black first gets some candles. She hopes the Browns' new house will 3 be filled with light. Different shapes ofcandles are 4 here. She puts some heart-shaped ones into herbasket. Then Mrs. Black takes broom (扫帚). 5 the gift, the Browns will always have healthyand happy life, 6 it can sweep (扫) bothdirt and bad luck away. Next, Mrs. Black takes bottle of 7.She wants the Browns' life to be as sweet as i真空中有两个静止点电荷，它们之间的静电引力为F．如果它们之间的距离增大为原来的2倍，而其中一个点电荷的电荷量减少为原来的，则它们之间的作用力的大小变为( )A． B． C． D．