胎儿出生前受照可导致不同程度的智力受损，其严重程度随剂量而（）
A.增加
B.减少
C.不变
D.无关
E.以上都不对
参考答案：A
.
Many companies give away small quantities of their produce as samples ____ people can try them before buying them.
A．if
B．because
C．so that
D．since
《联合国家宣言》
