【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
【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. ...
【判断题】同步时序电路由组合电路和存储电路两部分组成。
【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 ______ 。
【判断题】会计工作岗位责任制要求一人一岗,以符合内部控制制度的要求
【单选题】I'm sure they must have been afraid of ____( 被感染) , but they did not show it.
【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
【单选题】They must have made a right decision ,____they?
【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)