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【单选题】
女18岁。查体发现水冲脉,主动脉瓣第2听诊区可闻及叹气样舒杂音。水冲脉的发生机制是
A.
收缩压和舒张压均降低，脉压不变
B.
收缩压不变，舒张压升高，脉压降低
C.
收缩压降低，舒张压增高，脉压降低
D.
收缩压升高，舒张压降低，脉压增加
E.
收缩压和舒张压均增加，脉压不变
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参考答案：
举一反三
【判断题】个人的节约行为也是清洁生产的一部分。
A.
正确
B.
错误
查看完整题目与答案
【单选题】抽取血液,经抗凝、离心沉淀后,血液分为三层,从上至下为
A.
血清，白细胞，红细胞
B.
血清，红细胞，白细胞
C.
血浆，白细胞和血小板，红细胞
D.
血浆，红细胞，白细胞
E.
血浆，血小板，红细胞和白细胞
查看完整题目与答案
【单选题】二极管能保持正向电流几乎为零的最大正向电压称为（      ）。
A.
死区电压
B.
击穿电压
C.
截止电压
D.
峰值电压
查看完整题目与答案
【简答题】A Mortal Flower Han Suyin The day after meeting Hilda I wrote a letter to the Rockefeller Foundation, applying for a job. (1) Neither Father nor Mother thought I would get in. “You have to have pull. ...
查看完整题目与答案
【单选题】二极管能保持正向电流几乎为零的最大正向电压称为( )。
A.
截止电压
B.
击穿电压
C.
峰值电压
D.
死区电压
查看完整题目与答案
【单选题】二极管能保持正向电流几乎为零的最大正向电压称为 ______ 。
A.
击穿电压
B.
截止电压
C.
峰值电压
D.
死区电压
查看完整题目与答案
【单选题】I'm sure they must have been afraid of ____( 被感染) , but they did not show it.
A.
being moved
B.
being hurt
C.
being infected
D.
being made
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【单选题】Some women a good salary in a job instead of staying home, but they decided not to work for the sake of the family. A. must make B. should have made C. would make D. could have made
A.
must make
B.
should have made
C.
would make
D.
could have made
查看完整题目与答案
【单选题】They must have made a right decision ,____they?
A.
mustn't
B.
needn't
C.
havn't
D.
didn't
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【单选题】Indicate which of the proposed reconstructions best captures the argument in the following passages from Steven Jay Gould, "The Panda's Thumb". Orchids were not made by an ideal engineer; [since] they...
A.
(1) Orchids were not made by an ideal engineer. (2) Orchids are jury-rigged from a limited set of available components. ____________________________ ∴ (3) Orchids must have evolved from ordinary flowers. (from 1-2)
B.
(1) Orchids were not made by an ideal engineer. (2) Organisms that were not made by an ideal engineer must have evolved from ordinary organisms of the same kind. ____________________________ ∴ (3) Orchids must have evolved from ordinary flowers. (from 1-2) (4) Orchids are jury-rigged from a limited set of available components. (5) Organisms that are jury-rigged from a limited set of available components must have evolved from ordinary organisms of the same kind. ____________________________ ∴ (3) Orchids must have evolved from ordinary flowers. (from 4-5)
C.
(1) Orchids are jury-rigged from a limited set of available components. (2) Organisms that are jury-rigged from a limited set of available components were not made by an ideal engineer. (3) Orchids are organisms. ____________________________ ∴ (4) Orchids were not made by an ideal engineer. (from 1-3) (5) Organisms that were not made by an ideal engineer must have evolved from ordinary organisms of the same kind. (6) Orchids are a kind of flower. ____________________________ ∴ (7) Orchids must have evolved from ordinary flowers. (from 3-6)
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相关题目：
【判断题】个人的节约行为也是清洁生产的一部分。
A.
正确
B.
错误
查看完整题目与答案
【单选题】抽取血液,经抗凝、离心沉淀后,血液分为三层,从上至下为
A.
血清，白细胞，红细胞
B.
血清，红细胞，白细胞
C.
血浆，白细胞和血小板，红细胞
D.
血浆，红细胞，白细胞
E.
血浆，血小板，红细胞和白细胞
查看完整题目与答案
【单选题】二极管能保持正向电流几乎为零的最大正向电压称为（      ）。
A.
死区电压
B.
击穿电压
C.
截止电压
D.
峰值电压
查看完整题目与答案
【简答题】A Mortal Flower Han Suyin The day after meeting Hilda I wrote a letter to the Rockefeller Foundation, applying for a job. (1) Neither Father nor Mother thought I would get in. “You have to have pull. ...
查看完整题目与答案
【单选题】二极管能保持正向电流几乎为零的最大正向电压称为( )。
A.
截止电压
B.
击穿电压
C.
峰值电压
D.
死区电压
查看完整题目与答案
【单选题】二极管能保持正向电流几乎为零的最大正向电压称为 ______ 。
A.
击穿电压
B.
截止电压
C.
峰值电压
D.
死区电压
查看完整题目与答案
【单选题】I'm sure they must have been afraid of ____( 被感染) , but they did not show it.
A.
being moved
B.
being hurt
C.
being infected
D.
being made
查看完整题目与答案
【单选题】Some women a good salary in a job instead of staying home, but they decided not to work for the sake of the family. A. must make B. should have made C. would make D. could have made
A.
must make
B.
should have made
C.
would make
D.
could have made
查看完整题目与答案
【单选题】They must have made a right decision ,____they?
A.
mustn't
B.
needn't
C.
havn't
D.
didn't
查看完整题目与答案
【单选题】Indicate which of the proposed reconstructions best captures the argument in the following passages from Steven Jay Gould, "The Panda's Thumb". Orchids were not made by an ideal engineer; [since] they...
A.
(1) Orchids were not made by an ideal engineer. (2) Orchids are jury-rigged from a limited set of available components. ____________________________ ∴ (3) Orchids must have evolved from ordinary flowers. (from 1-2)
B.
(1) Orchids were not made by an ideal engineer. (2) Organisms that were not made by an ideal engineer must have evolved from ordinary organisms of the same kind. ____________________________ ∴ (3) Orchids must have evolved from ordinary flowers. (from 1-2) (4) Orchids are jury-rigged from a limited set of available components. (5) Organisms that are jury-rigged from a limited set of available components must have evolved from ordinary organisms of the same kind. ____________________________ ∴ (3) Orchids must have evolved from ordinary flowers. (from 4-5)
C.
(1) Orchids are jury-rigged from a limited set of available components. (2) Organisms that are jury-rigged from a limited set of available components were not made by an ideal engineer. (3) Orchids are organisms. ____________________________ ∴ (4) Orchids were not made by an ideal engineer. (from 1-3) (5) Organisms that were not made by an ideal engineer must have evolved from ordinary organisms of the same kind. (6) Orchids are a kind of flower. ____________________________ ∴ (7) Orchids must have evolved from ordinary flowers. (from 3-6)
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