— Rosie, Could you lead me to the school hospital? I don't know the way.
— No problem. Let's go.
A:take … to
B:put … into
C:add … to
修改句子。
但从所有太阳系的行星中,火星的环境是与地球最相像的。火星的直径大约是地球的一半,那里还有相当于地球上三分之一的重力和百分之一的大气浓度。
Shelly had prepared carefully for her biology examination so that she could be sure of passing it at her first ________.( )
过点(2,0)引直线l与曲线y=2-x2相交于A、B两点,O为坐标原点,当△AOB面积取得最大值时,直线l斜率为____