多选题 The ______ nature of the virus allows it to continually change its form and thus go undetected by the body"s immune system.
【正确答案】 B、D
【答案解析】[解析] ● allows说明前后同义重复。
● 空格与continually change its form(连续变换形态)同义重复。
● infectious传染性的,mutable易变的,debilitating使人衰弱的,protean易变的,benign仁慈的,contagious传染性的。答案选BD。
● 注:这里infectious和contagious是干扰项,同表示“传染性的”。