在体内作为脱羧酶辅酶的组成部分,参与维持正常的糖代谢及神经、心脏系统功能的维生素是()
A.维生素B1
B.维生素E
C.维生素B6
D.维生素C
E.叶酸
参考答案:A
The witnesses ______ by the police just now gave very different descriptions of the fight.
A.being questioned
B.questioned
C.to be questioned
D.having questioned
绑扎接头搭接长度应符合规范要求,在受拉区不得小于( )。
A.300mm
B.400mm
C.250mm