单选题
Every modern government, liberal or otherwise, has a specific position in the field of ideas ; its stability is
vulnerable
to critics in proportion to their ability and persuasiveness.
【正确答案】
B
【答案解析】[解析] 本题中，vulnerable的意思是“易受攻击的”。B项“susceptible易受影响的”符合题意，如：be susceptible to cold(容易感冒)。其他三项“futile无用的；feasible可行的；flexible灵活的”都不正确。