①升高温度 ②加入正催化剂 ③增大反应物浓度 ④将块状固体反应物磨成粉末 ⑤增大压强.
A:①②③④
B:①②④⑤
C:①③④⑤
D:①②③④⑤
— Can you talk with me _________ the phone?
— Yes, but not now.
1.6x=4.8
x=____