湾鳄锥状的牙齿有利于增大其啃噬猎物时的 ____,经测试,成年湾鳄1cm2的咬合力高达4.2×104N,合 ____Pa.(1cm2=10﹣4m2)
—Bill, what if your parents go out?
—They ask me to _______ myself.
—__________?
—At six o'clock in the afternoon.