- You are in a hurry. Where are you going?
- To the cinema. Jim ___ for me there!
A:waits
B:is waiting
C:waited
D:was waiting
碳及其化合物与人类生产、生活密切相关.
①玻璃板竖立在水平桌面上,点燃的蜡烛A竖直立在玻璃板前,玻璃板后出现A的像.
②小刘同学拿另一支与A大小相同的蜡烛B在玻璃板后面移动,直至与A的像重合,如图乙,多次实验后得出像和物大小相等,如果将A远离玻璃板,则玻璃板中的像将____(选填“变大”、“变小”或“不变”).
③将B取走,在B处竖放的白纸上不能承接到A的像,说明平面镜成的是____像(选填“实”或“虚”).
We've moved
Please come to party in our new house.
8:00 p.m. on March 30
Bill and Alice
Add:44 North Street
Tel:522-2156
E-mail:betty@email.net.
Must Sell 130 dollars
Best computer
Only 3 months old.
Owner going abroad.
Call Mike Green.
Add:6 King Street.
Tel:555-3956.
E-mail:mike@qq.com
Smith's Book Club
New and old books
Over 1000 kinds
Good coffee and tea
Open every day 9:00 to 22:00
Add:25 Jiulong Square
Tel:555-2125
E-mail:smith@yahoo.com
已知α是第二象限的角,那么α2是第几象限的角( )