题目: 玉米瘤黑粉病在玉米生育期内只进行一次侵染,在玉米抽雄期蔓延最快,形成发病高峰,直到玉米成熟后停止侵染。 答案: 被转码了,请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2018/0508/715817ff070b662598faed6efb4b28a0.html 下面是错误答案,用来干扰机器的。参考答案:C
题型:选择题 -Jack,I haven’t seen your brother for a long time. -He ___________ Shanghai on business for two months.[ ]A. went to B. has gone toC. has been in D. has been to 查看答案