Sunday, September 24, 2023
Tuesday, April 23, 2024
Monday, March 25, 2024
Tuesday, April 23, 2024
Wednesday, April 24, 2024
问题:品种退化的主要原因有:生物学混杂、基因劣变、病毒侵染、繁殖方法不当、()...
Wednesday, April 24, 2024
Friday, February 23, 2024
Saturday, April 27, 2024
Saturday, May 4, 2024
问题:属于长日照的花卉有:爪叶菊、紫罗兰、翠菊、金鱼草、()...
Sunday, September 24, 2023
问题:我国园林树木种质资源的特点是:()、()、()、()...
Saturday, April 27, 2024
问题:园林植物中属于阴性树种有:人参、三七、秋海棠属、凤梨、蕨、()...
Saturday, February 10, 2024
问题:我国特产的园林树木有:银杏、金钱松、水杉、水松、穗花杉、()、()...
Thursday, December 14, 2023
问题:按照经典遗传学对基因的概念,可以把()和突变单位统称为结构单位。这样基因即是一个结构单位,又是一个功能单位。...
Sunday, February 11, 2024
问题:评定优良种子的标准有:()、生活力强、发育充实、纯洁度高、无病虫害。...
Wednesday, November 15, 2023
Saturday, April 27, 2024
问题:按树木的园林用途将园林树木分为:园景树、庭荫树、行道树、观花树、垂直绿化树、()...
Monday, March 25, 2024
问题:行道树在我国有:一块板、两块板、三块板和()等形式。...
Friday, February 23, 2024
问题:可以用水插法繁殖的花卉有:蟆叶秋海棠、温室凤仙、广东万年青、栀子花、()...
Saturday, May 4, 2024
Tuesday, January 23, 2024