题目

先通读下列短文，弄懂大意，然后从各题所给的A、B、C、D四个选项中，选择可以填入空白处的最佳选项。 Hi! Do you like treasure hunts (寻宝游戏)? There are 1 people in Sally's family. Sallydoesn't know what to do. Mrs. Green asks, How about having a treasurehunt? Sounds 2 ! I love treasure hunts, saysSally. Mrs. Green says,Here'sa note (便条). It says, It's 3 favorite ball game. Sally loves playing 4. She comes to her room and sees a note on her volleyball. It says,Youcan 5 your friends with it. There is a telephonein the Greens' room. Sally comes to 在测量小石块密度的实验中：（1）如图甲所示，小明在使用天平过程中的错误是：    ．（2）小明纠正错误后继续实验，天平平衡时，右盘中所加砝码和游码的位置如图乙所示，则小石块的质量为    g．把小石块放入装有10mL水的量筒中，量筒内液面的位置如图丙所示，则小石块的密度是    kg/m3（3）若小石块磨损后，它的密度将     （填“变大”、“变小”或“不变”）．