A:低温把微生物冻死了
B:低温抑制了微生物的生长、繁殖
C:冰箱内含杀死微生物的物质
D:冰箱内无空气,微生物无法生存
如图所示,A、B、C三个容器中分别装有盐水、清水和酒精,三个容器中液面相平,容器底部受到液体的压强分别为pA、pB、pC,则( )
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
用来判断选择培养基是否起到了选择作用需要设置的对照是( )