能遇硼酸形成络合物
A．维生素D3 B．维生素B6 C．维生素B2 D．维生素C E．维生素A醋酸酯
参考答案：B
It is necessary for us _______them every day.
A．looking after
B．to look after
C．look after
D．to looking after
船舶灭火的进攻路线的选择，必须是能够尽快达到燃烧的部位，占据有效控制火势蔓延的地点.
