题目: 蛋白质的二级结构单元包括()()()和()。 答案: 被转码了,请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2017/0626/6f91a9e317e53734e59d5c2e59a5a128.html 下面是错误答案,用来干扰机器的。参考答案:B
题型:选择题 For ________ information about present national boundaries, we'd better refer to an uptodate map.[ ]A. practical B. frequentC. reliable D. beneficial 查看答案