性能预期受到消费者个人特性的影响。
参考答案:对
—I am going to spend my summer holiday in Hainan.
—How lucky you are! ____________ And don’t forget to e-mail me.
A.Congratulations!
B.Have a nice time!
C.Come on!
D.Good-bye!
木材的应力(N/cm2)等于()除以断面面积。