中科新闻网例假血发黑怎么回事:几道初一的题
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1.（科学）老师在课堂上做了下列实验：把一只生鸡蛋放入清水中，鸡蛋沉入杯底，往清水中溶入大量的食盐，鸡蛋慢慢浮上水面．不用其他工具，你还能用另外的方法使烧杯的鸡蛋浮上水面吗？
2.（英语）用介词或副词填空
（1）The teacher isn't here.He's talking______the students.
（2）Let's play basketball ______ class.
2．（英语）从B栏中选出正确答案填入A栏
A
A:Hi,Lucy!___1___
B:Well,I live near my school,so I get up at a quarter to seven.I never go to school late.
A:Do you have breakfast at home?
B:Yes,___2___
A:When do you go to school?
B:___3___,so I go to school ai seven forty-five.
A:___4___
B:I leave school at five past five and ___5___
B
A.When do you play games?
B.I have lunch at school.
C.When do you ge home?
D.Whai time do you usually get up on weenkdays?
E.I usually have some cakes and a glass of milk.
F.Class begins ai eight o'clock
G.I get home at five-thirty
2.（英语）用介词或副词填空
（1）The teacher isn't here.He's talking______the students.
（2）Let's play basketball ______ class.
2．（英语）从B栏中选出正确答案填入A栏
A
A:Hi,Lucy!___1___
B:Well,I live near my school,so I get up at a quarter to seven.I never go to school late.
A:Do you have breakfast at home?
B:Yes,___2___
A:When do you go to school?
B:___3___,so I go to school ai seven forty-five.
A:___4___
B:I leave school at five past five and ___5___
B
A.When do you play games?
B.I have lunch at school.
C.When do you ge home?
D.Whai time do you usually get up on weenkdays?
E.I usually have some cakes and a glass of milk.
F.Class begins ai eight o'clock
G.I get home at five-thirty
1、加醋
2、with
after
3、DEFCG
加大量糖等可以明显加大溶液密度的东西都可以。加醋不可以，醋酸密度为1.0492g/cm3，几乎不能增加溶液密度，而且醋里面大多数成分是水。
with,after
DEFCG
加醋是不可以的~~~学过化学的都知道醋会和鸡蛋壳发生化学反应！！应该加糖等一些比水密度大的可溶物！
1 加密度小于水的可溶物
2 TO AFTER
3 DEFCG
1 加醋
2 TO AFTER
3 DEFCG
1 加醋
2 TO AFTER
3 DEFCG