【简答题】猜一猜,选一选。 ( ) 1. father's father ( ) 2. mother's sister ( ) 3. father's mother ( ) 4. father's brother A. grandpa B. grandma C. uncle D. aunt
【判断题】DNA—DNA杂交主要用于种、属水平上的分类研究,而进行亲缘关系更远(属以上等级)分类单元的比较,则需进行DNA—rRNA杂交。
【单选题】—_______ bike is this? —It's _______. [ ]
A.
Who's, my father's friend
B.
Whose, my father friend's
C.
Whose, my father's friend's
D.
Who's, my father friend
【单选题】Eric’s father, a skilled worker has repaired a lot of bikes of this kind, so he will _______ suc
A.
78. Eric’s father, a skilled worker has repaired a lot of bikes of this kind, so he will _______ succeed in repairing your bike, I suppose. A.probably
【单选题】Eric' s father, a skilled worker has repaired a lot of bikes of this kind, so he will______succeed in repairing your bike, I suppose.
【单选题】—What's ________ job? —He's a teacher. [ ]
【判断题】DNA—DNA杂交主要用于种、属水平上的分类研究,而进行亲缘关系更远(属以上等级)分类单元的比较,则需进行DNA—rRNA杂交。
【简答题】根据句意完成句子。 1. We call mother's or father's brother ______. 2. We call mother's or father's sister ______. 3. Maomao's mother is my mother, but Maomao isn't my sister, but my ______. 4. Eric is my aunt'...
【简答题】水稻是世界重要粮食作物之一,在我国是第一大粮食作物,全国有近三分之二的人口以稻米为主食。在植物学分类上,水稻属于禾本科稻属,其种子由种皮、胚和胚乳三部分组成,种皮有保护作用,胚由胚芽、胚轴、胚根和子叶组成,胚乳是储存养料的结构,水稻所含的营养物质主要来自种子的胚乳。 水稻生产上使用的种子有两种类型:常规种和杂交种。我国北方地区多数种植常规种,南方地区多数种植杂交种。水稻杂交种是由被誉为“杂交水稻之...