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【单选题】
以下说法错误的是 ( )
A.
若一个二的树叶是某子树的中序遍历序列中的第一个结点，则它必是该子树的后序遍历序列中的第一个结点
B.
已知二的前序遍历和后序遍历序列并不能惟一地确定这棵树，因为不知道树的根结点是哪一个
C.
在前序遍历二的序列中，任何结点的子树的所有结点都是直接跟在该结点的之后。
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参考答案：
举一反三
【单选题】在系泊试验时,主机换向试验应在最低稳定转速下进行,从换向操纵开始到主机开始向相反方向运转为止,所需时间不超过( )s。
A.
8
B.
10
C.
15
D.
20
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【单选题】若需对8位二进制数中的某位取反,则可采用的运算是 。
A.
该位与1 进行逻辑乘
B.
该位与0 进行逻辑或
C.
该位与1 进行异或
D.
该位与0 进行异或
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【单选题】Why does the lecture refer to a "nanotechnology revolution"?
A.
Many scientists do not agree about the safety of nanotechnology.
B.
Many new products have been created because of nanotechnology.
C.
Nanotechnology is part of the computer revolution.
D.
The iPod Nano has created a revolution in how people listen to music.
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【单选题】(74～75题共用题干) 男，58岁，患有慢性支气管炎并阻塞性肺气肿。近日因感冒咳嗽喘息加重，并有低热，就诊前2小时突然喘息加剧，出大汗，用解痉止喘药均不能缓解。体检：喘憋状态，口唇发绀，左肺叩诊过清音，右肺鼓音，右肺呼吸音消失，左侧呼吸音增粗并有少量干啰音。 74．右肺的病情变化可能是发生了()。
A.
肺不张
B.
肺气肿
C.
胸腔积液
D.
胸膜增厚
E.
气胸
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【单选题】若需对8位二进制数中的某位取反，则可采用的运算是 。
A.
该位与 0 异或
B.
该位与 1 异或
C.
该位与 0 逻辑乘
D.
该位与 1 逻辑乘
查看完整题目与答案
【判断题】不论春植球根花卉或秋植球根花卉，其花芽分化多在气温较高的时节进行。
A.
正确
B.
错误
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【单选题】Which of the following statements reflects the woman's opinion about nanotechnology research?
A.
Nanotechnology is not a realistic prospect.
B.
Nanoparticle behavior is not well understood.
C.
Nanotechnology should not be researched.
D.
Nanosubstances are not currently safe to use.
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【多选题】Which of the following statements about nanotechnology are correct?
A.
The great attraction of working on the nanotechnology lies in new & unusual physical & chemical properties that are not found in the same materials at micro & macroscopic dimensions.
B.
Nanotechnology may be able to create many new materials & devices with a vast range of applications, such as in nanomedicine, nanoelectronics, biomaterials energy production, & consumer products.
C.
The usage of nanosystems, nanomaterials, nano-devices, etc. permeates all aspects of society.
D.
Nanotechnology is the manipulation of matter with at least one dimension sized from between 1 & 100 nm.
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【单选题】木质藤本属于下列()类花卉。
A.
球根花卉
B.
木本花卉
C.
宿根花卉
D.
草本花卉
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【单选题】若需对8位二进制数中的某位取反,则可采用的运算是 。
A.
该位与1进行逻辑乘
B.
该位与0进行逻辑乘
C.
该位与0进行异或
D.
该位与1进行异或
查看完整题目与答案
相关题目：
【单选题】在系泊试验时,主机换向试验应在最低稳定转速下进行,从换向操纵开始到主机开始向相反方向运转为止,所需时间不超过( )s。
A.
8
B.
10
C.
15
D.
20
查看完整题目与答案
【单选题】若需对8位二进制数中的某位取反,则可采用的运算是 。
A.
该位与1 进行逻辑乘
B.
该位与0 进行逻辑或
C.
该位与1 进行异或
D.
该位与0 进行异或
查看完整题目与答案
【单选题】Why does the lecture refer to a "nanotechnology revolution"?
A.
Many scientists do not agree about the safety of nanotechnology.
B.
Many new products have been created because of nanotechnology.
C.
Nanotechnology is part of the computer revolution.
D.
The iPod Nano has created a revolution in how people listen to music.
查看完整题目与答案
【单选题】(74～75题共用题干) 男，58岁，患有慢性支气管炎并阻塞性肺气肿。近日因感冒咳嗽喘息加重，并有低热，就诊前2小时突然喘息加剧，出大汗，用解痉止喘药均不能缓解。体检：喘憋状态，口唇发绀，左肺叩诊过清音，右肺鼓音，右肺呼吸音消失，左侧呼吸音增粗并有少量干啰音。 74．右肺的病情变化可能是发生了()。
A.
肺不张
B.
肺气肿
C.
胸腔积液
D.
胸膜增厚
E.
气胸
查看完整题目与答案
【单选题】若需对8位二进制数中的某位取反，则可采用的运算是 。
A.
该位与 0 异或
B.
该位与 1 异或
C.
该位与 0 逻辑乘
D.
该位与 1 逻辑乘
查看完整题目与答案
【判断题】不论春植球根花卉或秋植球根花卉，其花芽分化多在气温较高的时节进行。
A.
正确
B.
错误
查看完整题目与答案
【单选题】Which of the following statements reflects the woman's opinion about nanotechnology research?
A.
Nanotechnology is not a realistic prospect.
B.
Nanoparticle behavior is not well understood.
C.
Nanotechnology should not be researched.
D.
Nanosubstances are not currently safe to use.
查看完整题目与答案
【多选题】Which of the following statements about nanotechnology are correct?
A.
The great attraction of working on the nanotechnology lies in new & unusual physical & chemical properties that are not found in the same materials at micro & macroscopic dimensions.
B.
Nanotechnology may be able to create many new materials & devices with a vast range of applications, such as in nanomedicine, nanoelectronics, biomaterials energy production, & consumer products.
C.
The usage of nanosystems, nanomaterials, nano-devices, etc. permeates all aspects of society.
D.
Nanotechnology is the manipulation of matter with at least one dimension sized from between 1 & 100 nm.
查看完整题目与答案
【单选题】木质藤本属于下列()类花卉。
A.
球根花卉
B.
木本花卉
C.
宿根花卉
D.
草本花卉
查看完整题目与答案
【单选题】若需对8位二进制数中的某位取反,则可采用的运算是 。
A.
该位与1进行逻辑乘
B.
该位与0进行逻辑乘
C.
该位与0进行异或
D.
该位与1进行异或
查看完整题目与答案
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