棱长是6分米的正方体的体积和表面积相等．（判断对错）
No one taught French. He learned it all by .
A
The Cartoon Museum
Come and see the best of British cartoon art. There is something for everyone—including popular cartoon characters and a great shop full of funny books and cards.
Price: ￡4.00
Opening time:
Tuesday – Saturday 10:30-17:30
Sunday 12:00-18:00
Cox's Hotel
Tel: 01789 404600
E-mail: info@coxshotel.co.uk
Website: www.coxshotel.co.uk
Coffee shop: 9:00am-6:00pm
Tea room: 10:30am-5:30pm
Pub: 12:00- midnight (1:30am on Friday/Saturday)
Stratford Butterfly(蝴蝶)Farm
Tel: 01789 299288
E-mail: sales@butterflyfarm.co.uk
Visit: www.butterflyfarm.co.uk www.jxyyjx.com
Price: ￡5.50 adult ￡4.50 child ￡16 family
Opening Hours: Summer 10am-6am
Winter 10am-4:30pm
一瓶未贴标签的粉末状常见金属R，为了测定R的相对原子质量，准确称取一定量金属粉末，在坩埚内加强热使其完全氧化，冷却后再称重，重复试验，获得如表数据。请回答：
试验次数
金属质量（g）
金属氧化物质量（g）
1
45.0
84.9
2
85.1
3
85.0
平均值
m
（1）表格中m= 。
（2）该金属氧化物中，R元素和氧元素的质量比为 。
（3）已知R的化合价为+3价，则R的相对原子质量为 。
，B＝
，若A
B，则a的取值范围是（ ）
