将一定质量的金属锌投入63.7g稀硫酸中，恰好完全反应，放出气体的质量与反应时间的关系如图所示．试求（计算结果精确到0.1%）：
如图所示的电路中，电源电压6V保持不变，定值电阻的阻值为10Ω，滑动变阻器的最大阻值为20Ω。当开关闭合，滑片由b端向a端移动的过程中，以下说法正确的是（）
根据提示写单词。
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
