把61.235精确到0.01是____;3.15万精确到____位.
— Thanks for listening to my problem and giving me your advice, Amy.
— _________. That's what friends are for.
如图,在△ABC中,D,E分别是AB,AC的中点,AC=12,F是DE上一点,连接AF,CF,DF=1.若∠AFC=90°,则BC的长度为( )
如图所示为物质出入细胞的两种方式(黑点代表物质分子),则相关叙述正确的是( )
What about there by bus, Tom?