一张贺卡的价格为2元，教师节小明用自己积攒的零花钱买了m张贺卡送给老师，则小明一共花去______元钱．
小明一共花的钱数=2m，
故答案为2m．
小题1:How many parts does the book have?
A．1
B．4
C．18
D．233小题2: If you’re interested in shopping you can read _____.
A．Chapter 3
B．Chapter 8
C．Chapter 16
D．Chapter 18小题3: The book does NOT include _____.
A．help with European languages
B．information about visas
C．ideas about what to take on a trip
D．a section about traveling with pets
导致闭经的机理应除外哪项：（）
A.肝肾虚损
B.气血亏虚
C.阴虚血燥
D.血热
E.血瘀气滞
