搜题请搜索小程序“爱下问搜题”
问题 填空题

下列仪器中，能直接在酒精灯火焰上加热的是               

A．烧杯              

B．试管              

C．集气瓶        

D．                 ．

答案

B，蒸发皿．

多选题

下列说法中正确的是[ ]

A．同种介质中，光的波长越短，传播速度越快

B．泊松亮斑有力地支持了光的微粒说，杨氏干涉实验有力地支持了光的波动说

C．某同学在测单摆的周期时将全振动的次数多记了一次，则测出的周期偏小

D．静止在地面上的人观察一条沿自身长度方向高速运动的杆，观察到的长度比杆静止时的短

查看答案
填空题

A.How    B. a little   C. giraffe   D.Where  E. cute   F. their 
G. long  H. is eating  I.animals   J. going   K. people   L. in

 
    

 
There is a zoo near my house. I like ___1__ there. There are many ___2__ in it.
Look! There is a koala ___3__ the tree. Isn’t he __4___? Under the tree, there is a ___5___. Her neck(脖子) is so long. She is a lovely girl. __6____ is the panada? She is eating the bamboo(竹子). She’s ___7___ shy. But the elephant is interesting. He is playing with kids with his__8___nose. They are very funny. Look! In the pool, there are two dolphins. They are playing with ___9__ balls. ___10__ happy they are !
查看答案