器材:天平和砝码、刻度尺、一只小烧杯、细线、适量的水、滴管和足量的牛奶.
要求:写出每种方法实验步骤、所测量的物理量,并用所测量的物理量写出牛奶密度的数学表达式.
“爱花的人,心灵也是方香的。”这句西方谚语告诉我们( )
根据下列四则材料内容,选择正确答案。
(A) For Sale
Bicycle made in China
Good condition
Zhang Ying, 306, dormitory(寝室)4
(B) Roommate Wanted
Male(男)—English native speaker
wanted to share a 2- bedroom apartment
near campus(校园), washer, dryer, kitchen
Call Li, 288-940605 any evening after 5
(C) Lost
Black briefcase(公文包)with 3 books on physics
Call: John Smith 843-3160645
(D) Found
Brown briefcase with some money
See: Joseph Hofman in Chemistry Dept(系)