不同种类的食物混合食用,可改善膳食中( )
A.净利用率
B.必需氨基酸比例
C.真实消化率
D.表观消化率
E.蛋白质含量
参考答案:B
The managers discussed the plan that they would like to see___________ the next year.
A.carry out
B.carrying out
C.carried out
D.to carry out
电梯厢内的摄像机应安装在()的左或右上方。