正确的说法是( )
A:肼的化学式NH2
B:上图中有两种氧化物
C:该反应属于置换反应
D:1mol肼中约含6.02×1022个分子
Car Services
Bring your car into Car Services today!We will clean your car and repair your engine at very reasonable prices. Drive your car into our workshop located at Xinhua Road, or make an appointment.
Tel:7195638
Car Washing: ¥10
Engine Repairing: Only ¥180
Tyre (轮胎) Servicing: ¥15 for each
The building which saves people from bad weather.
This building near the sea in New Orleans looks like something from a scifi film (科幻电影). It is over 360 meters high, and is designed to house up 40,000 people, named the Noah. This building is strong enough to avoid the damages of bad weather.
Beach Cleanup Day
We need volunteers to clean the beach!
Sunday, July 20
Meet at 8:30 a.m. at Coast Square.
Start at 9:00 a.m. and end at noon.
Bring bags and gloves.
For more information, call Zhang Lin at 564-0657.
Apartment to Rent (出租)
A new apartment to be rented in the city centre. One bedroom and one kitchen. Near the bus station, at No. 22 Changjiang Road. Buses pass the front gate.
If you are interested, please have a look at the apartment or you can call Mrs. Yu at 2747130.
我们在教室的各个方向都能看到黑板上的字,这是光照到字表面发生了____现象;而学习或工作用的台灯上有一个灯罩(如图所示),其中作用是利用光的____定律将光线尽量集中到需要照射的地方,因此灯罩内表面应尽量____(填“光滑”或“粗糙”)。
《凡尔赛和约》中,最能体现巴黎和会分赃性质的规定是( )