正确答案: A

定芽

题目：马铃薯块茎上凹陷处具有( )。

解析：A

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举一反三的答案和解析：

[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

处理有丝分裂中期 正在发生基因自由组合 将形成配子 正在发生DNA复制

解析：

此时细胞内10条染色体和10个DNA分子，没有染色单体即DNA未复制，且细胞开始溢缩则应处于分裂的末期。

[单选题]It was _____ he came bank from Africa that wear _________ he met the girl he would like to marry.

not until; that

[单选题]在木材的横切面上能显示出射线的( )。

长度和宽度

[单选题]衣藻的减数分裂为合子减数分裂。( )

正确

[单选题]In Paragraph 2, the author uses jazz an example to

compare it with rock music

[单选题]甲聚落第三天的天气状况为

晴暖有微风

[单选题]The fact has worried many scientists ______ the earth is becoming warmer and warmer these years.

that

[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.

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。

错误