关于螺内酯，正确的是
A．利尿作用弱而持久
B．起效慢
C．久用可引起高血钾
D．对切除肾上腺者有效
E．可以治疗肝性水肿
参考答案：A,B,C,E
简述疟原虫引起肝脾肿大的原因。
“It is declared that this shipment does not contain any wood packing materials.”与这句话意思接近的是( )。
A．We declare that no wood packing material was used in this shipment.B．No declaration was made whether wood packing materials had been used or not.C．If you don't make any declaration, we will not use any wood packing material.D．We will not use any wood packing material since you have provided us a declaration of no-wood packing material.
