当3<a<4时,化简|a﹣3|+|a﹣4|=( )
1
With all the things she needed _____, she went home happily.[ ]
A. to buy
B. to be bought
C. buying
D. bought
下列各种脂蛋白中,蛋白质含量最多的脂蛋白是()
A.CM
B.β-脂蛋白
C.前β-脂蛋白
D.α-脂蛋白
E.γ-脂蛋白