“交友是一个平等互惠的过程”,对这就话的理解正确的是( )
A:交友是一种等价交换,朋友给你多少,你就要给朋友多少
B:给予朋友就要求朋友回报
C:朋友之间的给予和分担是双向的
D:交友可以得到财富和物质享受
计算:(﹣3)×2+4=____
How would you like if you were watching your favorite TV program and someone came into the room and just shut it off without asking you?
划分东西半球的界限是( )