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【单选题】
已知二叉树的后序遍历序列是dabec,中序遍历序列是debac,它的前序遍历序列是()
A.
acbed
B.
decab
C.
debac
D.
cedba
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【多选题】Which of the following statements about the male reproductive system are correct?
A.
In males, the main organs of the reproductive system are the epididymis, prostate gland, seminal vesicles, vas deferens, penis, testes and scrotum.
B.
The penis and scrotum are the male external genitalia.
C.
The seminal vesicles and prostate gland make seminal fluid, which joins the sperm through the vas deferens.
D.
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A.
表格和层可以互相转换
B.
表格可以转换成层
C.
所有层都可以转换成表格
D.
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A.
正确
B.
错误
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A.
表格和层可以互相转换
B.
表格可以转换成层
C.
只有不与其它层交叠的层才可以转换成表格
D.
表格和层不能互相转换
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A.
External iliac vein
B.
Internal iliac vein
C.
Inferior vena cava
D.
Common iliac vein
E.
None of the above
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A.
表格和层可以互相转换
B.
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C.
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D.
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