【名词&注释】
减数分裂(meiosis)、有丝分裂(mitosis)、不定根(adventitious root)、马铃薯块茎(potato tuber)、自由组合(independent assortment)、天气状况(weather condition)
[单选题]马铃薯块茎上凹陷处具有( )。
A. 定芽
B. 不定芽
C. 定根
D. 不定根
查看答案&解析
举一反三：
[单选题]某二倍体动物的某细胞内含有10条染色体、10个DNA分子，且细胞膜开始缢缩，则该细胞
A. 处理有丝分裂中期
正在发生基因自由组合(independent assortment)
将形成配子
正在发生DNA复制
[单选题]It was _____ he came bank from Africa that wear _________ he met the girl he would like to marry.
A. when; then
B. not; until
C. not until; that
D. only; when
[单选题]在木材的横切面上能显示出射线的( )。
A. 长度和宽度
B. 高度和宽度
C. 长度和高度
D. 长度、高度和宽度
[单选题]衣藻的减数分裂为合子减数分裂。( )
A. 正确
B. 错误
[单选题]In Paragraph 2, the author uses jazz an example to
A. compare it with rock music
B. show music identifies a society
C. introduce American musical traditions
D. prove music influences people’s lifestyles
[单选题]甲聚落第三天的天气状况(weather condition)为
A. 晴天转阴雨
B. 大风有浮尘
C. 晴暖有微风
D. 阵风间暴雨
[单选题]The fact has worried many scientists ______ the earth is becoming warmer and warmer these years.
A. what
B. which
C. that
D. though
[单选题]---- I' m surprised to hear that Sue and Paul have __ .
----So am I. They seemed very happy together when I last saw them.
A. broken up B．finished up C．divided up closed up
[单选题]我们食用的马铃薯和甘薯都是变态的茎。
A. 正确
B. 错误
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