毒物排泄的主要途径是（）。
A．肝
B．胆道
C．大肠
D．肾
E．肺
参考答案：D
浸润的滞后性与平衡态浸润
The cargo must be shipped directly to China, that is, ( ) is not allowed.
A．partial shipment B．transshipmentC．through shipment D．total shipment
