通常取( )倍或2倍中误差作为极限误差。
A．1
B．3
C．4
D．6
参考答案：B
—Excuse me. Could you tell me ______?
—It will leave at 4:00 p.m.
A．how will you go to Shanghai
B．how you will go to Shanghai
C．when will the bus leave for Shanghai
D．when the bus will leave for Shanghai
影响圆筒混合机混匀效率的因素有哪些？
