He his father. They both like helping others.
A：takes place
B：takes after
C： takes care
D：takes care of
函数y=1-x2x+1+x-2是 （ ）
—You look _______ today.
—Yes. I stayed up late last night to watch a cartoon.
印度最重要的河流是（ ）
已知实数a，b，c，d满足a+b+c+d=3，a2+2b2+4c2+4d2=5则a的最大值为（ ）
