正确答案: D

叶轴翅有或无，宽或窄

题目：柑橘(桔)属常见种的鉴别特征之一是( )。

解析：D

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举一反三的答案和解析：

[单选题]51______

discovered

[单选题]“其实胸中之竹，并不是眼中之竹也，因而磨墨展纸，落笔倏作变相，手中之竹又不是胸中之竹也。”郑板桥的这句话蕴含的道理是

意识活动具有主动创造性 B．意识活动具有客观实在性

[单选题]40_______

dressed up

解析：

本句描述了自己的穿戴，所以句意应为“我等在后台，穿着黑色的紧身衣，扎着金色的腰带。”表示“穿着”用dress up。

[单选题]44_______

later

[单选题]EFear plays no part in this latest problem．“I’m not afraid I'll lose my children．I won't lose my children. We live together, and nothing, nothing,”she repeats, her voice rising when speaking to John's lawyer, “will stop me from being with my children. A law? Year, right. Don't disturb me when it comes to my children. You are never going to win. If John wants to see them, I cannot stop him. He's their father­­—I want them to see him! However, his visit in his present condition will disturb the children's stable (稳定的) life．”

can’t take her children away from her

[单选题]甜菜肉质根中可出现( )层额外形成层。

多

[单选题]

radio