A. Today is Sunday.
B. He flies a kite.
C. The girl plays with her teddy bear.
D. We read books.
E. They play catch with a ball.
贾思勰的著作是（ ）
①____ Na2S2O3+____HCl→____ NaCl+____S+____SO2↑+
____H2O
②____ Zn+____H++____NO3﹣→____ Zn2++____NH4++____H2O．
用方框中所给词或短语的适当形式填空
as a result such as as well as encourage be interested in
单价x（元）
8
8.2
8.4
8.6
8.8
9
销量y（件）
90
84
83
80
75
68
