We are ______by doctors to eat more natural food and take plenty of physical exercise.

[       ]

A. suggested

B. warned

C. informed

D. advised

氯氨的抗疟原理是

A．抑制疟原虫的二氢叶酸还原酶

B．损害疟原虫线粒体

C．影响疟原虫DNA复制和RNA转录

D．干扰疟原虫对宿主血红蛋白的利用

E．以上都不是