——I am going to Qingdao and stay there for a week.
——______ you are there, would you please buy some books for me?
A:If
B:While
C:Since
D:As soon as
____
长江最大的支流是( )
读课文《张衡》,回答问题
《张衡》叙述的是我国____时期科学家____发明____的事。课文通过对地动仪发明过程的介绍,赞颂了张衡____的科学精神和为我国科学事业做出的____。