面积是100平方米的正方形草坪,边长是多少米?
10米
在化学反应:4NH3+5O2 催化剂 . 4x+6H2O中,x的化学式应为( )
A.N2O5
B.N02
C.NO
D.HNO3
good service, the restaurant offers different kinds of traditional Fujian dishes.
A.In addition
B.Apart from
C.Instead of
D.Except for