— I heard that you would study abroad next term.

— ____. We can keep in touch with each other by E-mail. [ ]

A. So do I

B. Nor do I

C. So will I

D. So I will

基托内出现圆形大气泡的原因是

A．热处理温度不够

B．热处理时间过长

C．热处理时升温过快

D．塑料充填过多

E．塑料充填不足