This is Nancy. She is ________from Africa.
A:an elephant
B:a elephant
C:elephant
D:elephants
现有盐酸和CaCl2的混合溶液,向其中逐滴加入过量的某物质X,溶液的pH随滴入X的量的变化关系如图所示,则X可能是( )
铝合金因具有坚固、轻巧、美观、易于加工等优点而成为多数现代家庭封闭阳台时的首选材料,这与铝合金的下列物理性质无关的是( )
Actor wanted by Movie Company
Can you sing and dance? Can you work with other people?
Can you work evenings and weekends?
If you want to be an actor, please call the Movie Company at 9935673.
Wanted
Do you like to talk with different people? Do you like a busy but interesting job? Do you like to join the TV station?
Work time: 8: 30a.m.—5: 50p.m., 5 days a week.
Tel: 2433571, 2433572, 2433573
Add: No. 24, Rose Building, Wilton Street
We need Teachers
Do you love children? Are you friendly to children?
Do you like to teach children English, math, history or biology?
Call the Green Children's School at 5113470 or send your e-mail to Children@yahoo.com
化学与生产生活紧密相关.请回答下列问题:
(1)用活性炭除去冰箱中的异味,是利用了活性炭的____性;
(2)在家庭生活中,通过____的方法可以降低水的硬度;
(3)熄灭酒精灯时,用灯帽盖灭,其灭火的原理是____.