A:①②
B:①④
C:②③
D:③④
下列植物器官中,属于生殖器官的是( )
已知4a﹣6与﹣6互为相反数,求a的值.
Juliette's website
Name
1 Girls
Development
At ten, Juliette drew 2 little girls.
She started the website with the help of her 3.
At first, there were only some simple pictures on the website.
Now, it has message boards, chat rooms, 4 , music and more.
Aim(目的)
To help the girls learn more about cultures,5 and become better.
①将单层玻璃板固定在有一定倾角的斜面上,把玻璃球靠在玻璃板的右侧,把橡胶球悬挂在支架上靠在玻璃板的左侧(如右图)。
②随意拉开橡胶球,放手后让其敲击玻璃板,玻璃球被弹开,记下玻璃球被弹出的距离。共做10次。
③换成双层玻璃板重复上述实验。
2010年的东亚足球四强赛中,中国队与韩国队的比赛进行到第62分钟时,中国男足队员邓卓翔连过三人杀入禁区,一脚冷静的弧线球绕过门将,直入球门后角,3:0锁定胜局。足球离开脚面后在空中飞行的过程中,使足球运动状态发生改变的施力物体是