题目

I had the meanest mother in the whole world.  While 1 kids ate candy for breakfast, I had to have porridge, eggs or toast.When others had coke and candy for lunch, I had to eat a sandwich..  But at least, I wasn't  alone when I was 2  My sister and tow brothers had the3 mean mother as I did .  My mother 4 to  know where we were at all time. She had to know who our friends were and where we were going. We had to clean clothes and take a  5  every day . The other kids got to wear the same clothes for days . We could not lie in bed  “sick” in order to 6 school .  The 如右图，轻弹簧上端与一质量为m的木块1相连，下端与另一质量为M的木块2相连，整个系统用细线悬挂于天花上，并处于静止状态。现将细绳剪断，设细绳剪断瞬间，木块1的加速度大小为，木块2的加速度大小为。重力加速度大小为g。则有 A．，         B．， C．，  D．，