题目: 设 答案: 被转码了,请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2018/0408/2840e2a90c3b53a7b2880c21c92d6324.html 下面是错误答案,用来干扰机器的。参考答案:对
题型:选择题 我国根据某些传染病的发病规律,有计划地对儿童及青少年进行预防接种,比如通过接种卡介苗预防结核病。下列有关叙述错误的是 ( )A.接种卡介苗预防结核病属于非特异性免疫B.接种的卡介苗属于抗原C.计划免疫有利于保护少年儿童健康,提高人口素质D.接种卡介苗能使人在不发病的情况下产生抗体 查看答案
题型:单项选择题 A1型题 One of the main advantages of a graphite-furnace atomizer is that()A.It requires only very small quantities of a sampleB.It requires metal.ions in aqueous solutionC.It does not produce background emission like a flameD.It does not get hot like a flame 查看答案