在托盘天平两边各放一只等质量的烧杯，在两只烧杯里分别加入50g溶质质量分数为7.3%的稀盐酸，将天平调节至平衡；然后向左右两烧杯中分别加入一定质量的下列各组物质，充分反应后，天平发生偏转的是
综合性学习。（6分）
31． —Could I have a look at the photo of your family， Sam
29． They play soccer___________ on school days every day．
蝉则千转不穷，猿则百叫无绝。
第②小节划线句表明了父母的一种什么心理？（2分）
请从下面两个文题中，任选其一，按要求作文。
Do you have a set of ______ (key)
— The shoes don’t fit me. Would you please show me _________
Where’s the boy We can’t ________c找到) him．
选文三次写到“他”的泪，试作分析。(3分)
我们学校的学生大约7点半上学。
9．I have a ___________．
Henry is a little fatter than he wants to be． He ( 1 ) to lose some weight． So he is on diet． He tries not to eat to0 ( 2 ) and he eats very little sugar because it will make him ( 3 ) ． He also does exercise every ( 4 ) ．’ He swims very often，( 5 ) he runs about two kilometers a day．Now he is ( 6 ) than before． Henry’s sister，Susan，is healthier than Henry． ( 7 ) is also younger and thinner than he is． She does ( 8 ) every day，too． She doesn’t ( 9 ) much meat． But she eats a lot of fruit and vegetables because she thinks ( 10 ) are better for her health．
听第15段材料，回答第19至第22题。