A:反应方程式中的x=1
B:t2时刻改变的条件是使用催化剂
C:t3时刻改变的条件是移去少量物质D
D:t1~t3间该反应的平衡常数均为4
小冰学习虽然很努力,但成绩总是不理想。妈妈总是批评他玩心重,小冰很委屈,同妈妈大吵了一架。对此,下列观点正确的是( )
①取新鲜的馒头,切成大小相同的A、B两小块,分别用刀细细地切碎、拌匀。
②将馒头碎屑A与2毫升唾液放入甲试管中充分搅拌;将馒头碎屑B与2毫升清水放入乙试管中充分搅拌(如图)。
③将两支试管一起放入37℃左右的温水中。
④10分钟后,同时取出两支试管,各滴加2滴碘液,摇匀。
请根据上述过程分析回答:
阅读短文,判断下面句子与短文内容是否相符。
I'm Wendy.I'm from Canada.Now I live in Guangzhou.Guangzhou is windy and cool in winter.It doesn't snow, and sometimes it's rainy.Today is January 28th,Spring Festival.I wear my new sweater and jeans.I go to the park with my parents in the morning.I visit my aunt Alice in the afternoon.In the evening,I have a big meal.I have chicken,beef,fish,mutton, tomatoes and carrots.They are delicious.