Men are equally as good as women at taking care of others; better ______, male nurses can be a great help in keeping patients still while they receive painful treatment.

A．yet

B．much

C．enough

D．even

下列哪项不是影响肉牛生产的环境条件（）

A、温度、空气湿度

B、绿化面积

C、气流、光照

D、尘埃、有害气体、噪声