【简答题】小明对遗传学知识非常感兴趣,他选择了有耳垂、无耳垂这对相对性状,对家族成员进行了调查。结果如表所示: (1)根据表中各成员的性状表现,请你推测这对相对性状中的隐性性状是__________。 (2)如果显性基因用D表示,隐性基因用d表示,那么,表中各成员表现为有耳垂的基因组成是__________。 (3)小明的外祖父、外祖母均有耳垂,小明的母亲却无耳垂,这种现象被称为______________...
【简答题】根据你所学的知识,选择 1 种你感兴趣的食品进行感官检验?
【单选题】如果柱塞泵式喷射系统油道中的空气排放不净,则会出现______。
【单选题】----How do you find the film you saw last night? ---- ________. I can’t think too highly of it.
【单选题】What do you think of the house? _____.It’ s everything we’ ve been looking for.
【简答题】Chris: Boring. I was at home all weekend. How about you?Ana: You know me. I'm never home on weekends.Chris: (Where were you?)A. YesB. No
【单选题】化肥生产设备用高压无缝钢管的适用压力为:10MPa至( )Mpa。
【单选题】下列与混合斑的特点和检验的影响因素描述不符的是:( )
A.
混合斑检材常出现在多人受伤现场血迹、性犯罪案件、指甲垢等情况中
C.
多个体血液混合斑比精液和阴道液混合斑检验更容易
【简答题】I 、从方框中选择正确的词,并用其适当形式填空 best, think, work, interest, subject 1.--Where are Tom and Jim? --They are on math problems in the classroom. 2.--What do you teach? --I teach English. 3.--What do you of our c...