一Don't worry about your trip to the US. I'll be with you all the way.
一OK. Thank you. It'll be my first time to travel abroad.
A:from beginning to end
B:on the way
C:in the way
按课文内容填空
下列句子中加线字的读音,不正确的一项是( )
等比数列an中,a4=4,则a2·a6=( )