关于X线对比度叙述错误的是()
A.是透过物质后X线强度的差异
B.符合指数规律
C.受X线吸收系数影响
D.与人体吸收无关
E.对比剂可改变对比度
参考答案:D
If people eat natural plant poisons by mistake, they _______ go to hospital without delay.
A.would
B.can
C.may
D.must
A.+→
B.→+
C.+→
D.→+