A:向水中加入稀氨水,平衡逆向移动,c(OH-)降低
B:向水中加入少量固体硫酸氢钠,c(H+)增大,KW不变
C:向水中加入少量固体CH3COONa,平衡逆向移动,c(H+)降低
D:将水加热,KW增大,pH不变
句型转换 (1)My father works on a farm.(变一般疑问句)____ your father ____ on a farm?(2)What do you think of the yellow dress?(改成同义句)____do you____ the yellow dress?(3)His mother is a nurse.(加doctor构成选择疑问句)____ his mother a nurse____ a doctor?(4) It is 9:30 now.(就划线部分提问)____ is it now?(5)She doesn't have any pears.(变肯定句)She ____ pears.(6)We play volleyball.(改为以Let开头的句子)____volleyball.(7)Can I help you?(改成同义句)What____ I ____ you?
如图是人体呼吸系统示意图,据图回答.