白粉病发病后期,病斑变成()。 A.褐色 B.灰色 C.黑色 D.青色 发布时间:2017-05-09 05:04 │ 来源:www.tikuol.com 题型:单项选择题 问题: 白粉病发病后期,病斑变成()。A.褐色B.灰色C.黑色D.青色
题型:单项选择题 下列离子方程式书写正确的是A.氧化铝粉末投入NaOH溶液中: Al2O3+2OH-=2AlO2-+H2↑B.金属钠与水反应:2Na+2H2O=2Na++2OH-+H2↑C.碳酸钙与盐酸反应:CO32-+2H+=H2O+CO2↑D.氢氧化钡溶液与稀硫酸反应:Ba2++SO42-=BaSO4↓ 查看答案
题型:单项选择题 关于农村电价的规定,下列说法正确的有( )。A.《电力法》规定农业用电价格按照保本微利的原则确定B.农民生活用电与当地城镇居民生活用电应当逐步实行相同的价格C.过去农村电价主要由省级政府价格主管部门管理,部分省将管理权下放到了地(市)、县(市)政府价格主管部门D.目前,农村电价尚未纳入城市电价体系,由国务院价格主管部门另行管理E.1997年以来,国家加强了对农村电价的管理力度,对农村电价的构成进行了规范,要求实行农村分类综合电价 查看答案
题型:单项选择题 从方框中选择适当的选项完成对话。A. Let's go in the afternoon. B. He likes Jackie Chan very much. C. I'm going to see a Jackie Chan's film. D. I'd like to go to a football match. E. When is the film? Karl: Hello, Jack. What would you like to do this morning? Jack: 1 Karl: Oh, I don't like football. When are you free (空闲的)?Jack: This evening and tomorrow. Karl: Good. 2 Would you like to go with me? Jack: That's a great idea. What's the name of it? Karl: Looking for Jackie (《寻找成龙》). Jack: 3 Karl: Tomorrow, in the afternoon and in the evening. Jack: 4 Karl: OK. Let's ask Sam to go with us tomorrow. 5 1._____ 2._____ 3._____ 4._____ 5._____ 查看答案