①Cl2+H2O ②Na+H2O ③NO2+H2O ④Na2O2+H2O
A:①
B:②
C:③
D:④
—____ are you going to play football?
一This afternoon.
The police arrived at the________where the car accident happened and took pictures.
昆虫种类
害虫
害虫天敌
蚜虫
(头/枝)
螨
(头/叶)
小花蝽
瓢虫
盲蝽
生态果园
39.3
0.34
0.47
0.29
0.33
对照果园
79.1
2.58
0.15
0.16
0.02