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【简答题】化能无机营养型微生物的能源是__________,氢供体是__________,基本碳源是__________,这类微生物的代表如__________、__________、__________、__________和__________等。
【单选题】These is a new type of advertisement becoming increasingly common in newspaper classified columns. It is sometimes placed among 'situations vacant', although it doesn't offer anyone job, and sometimes...
A.
informs job hunters of the opportunities available
B.
premises useful advice to those looking for employment
C.
divides available jobs into various types
D.
informs employer that people are available for work
【单选题】London is becoming a serious______to New York as the world's banking and financial services center.
A.
city
B.
rival
C.
employer
D.
opposition
【单选题】There is a new type of advertisement becoming increasingly common in newspaper classified columns. It is sometimes placed among 'situations vacant', although it doesn't offer anyone job, and sometimes...
A.
informs job hunters of the opportunities available
B.
promises useful advice to those looking for employment
C.
divides available jobs into various types
D.
informs employer that people are available for work
【单选题】图示三杆结构，欲使杆3的内力减小，应该（ ）【图片】
A.
增大杆 3 的横截面积
B.
减小杆 3 的横截面积
C.
减小杆 1 的横截面积
D.
减小杆 2 的横截面积
【单选题】图示三杆结构，欲使杆3的内力减小，应该 。【图片】
A.
（ A ）增大杆 3 的横截面积；
B.
（ B ）减小杆 3 的横截面积；
C.
（ C ）减小杆 1 的横截面积；
D.
（ D ）减小杆 2 的横截面积。
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