第一步：取上述三种研细的化肥各少量，分盛于三支试管中，均滴入少量盐酸．有气泡放出的是碳酸氢铵，无明显现象的是氯化铵和硫酸钾．涉及化学方程式：
NH4HCO3+HCl═NH4Cl+____+____；反应类型____
第二步：另取少量氯化铵和硫酸钾两种化肥，分别在试管中配成溶液，各滴入几滴氯化钡溶液，生成白色沉淀的是____，无明显现象的是____．写出生成白色沉淀的化学方程式：____．小兰同学认为也可以把氯化钡溶液换成氢氧化钠溶液，同样能鉴别出这两种化肥，当看到现象为：____则是氯化铵．
Mike likes playing volleyball, but he doesn't like playing guitar.
1⊙3=1×4+3=7 5⊙2=5×4+2=22；
6⊙（﹣1）=6×4﹣1=23； ﹣4⊙（﹣3）=4×4﹣3=﹣19
A: Your bedroom is really nice.
B: ____
A: ____
B: There is a desk, a chair and a big bed.____
A: There is a nice photo on the wall. Wow!____
B: Thank you. My computer is on the desk.____
A. I like my bed.
B. Thanks.
C. Let's play!
D. What's in the room?
E. You look cool!
