下列哪项为儿童必需氨基酸()
A.谷氨酸
B.胱氨酸
C.酪氨酸
D.组氨酸
E.脯氨酸
参考答案:D
The 21stWinter Olympic Games were successfully held in_____city of Vancouver,_____ big city in Canada.
A.a;a
B.the;a
C.a;the
D.the;the
利用畜牧经济管理课学的内容对阿拉尔垦区建猪场或鸡场动工前的论述?