文字规范化的内容包括（）规范、（）规范、（）规范、（）规范、（）规范和（）规范等。
文字是交际的最重要的辅助工具。
A. 对
B. 错
The ______ is the source of power that provides the torque or turning force which is used to drive the vehicle.
A. engine
B. cylinder
C. bore
D. crankshaft
The cylinders and pistons are in the ______ the cylinder block and the crankshaft is in the lower part.
A. left part of
B. upper part of
C. right part of
D. bottom part of
微信支付 
支付宝支付