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【单选题】
某一圆筒形压力容器,平均内径为l000mm,壁l0mm,其操作压力为28MPa。则压力容器的轴向应力与环向应力各为( )MPa。A.
70, 140
B.
140, 70
C.
280, 560
D.
560, 280
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举一反三
【多选题】When revising your abstract, you should ___________.
A.
correct weaknesses in organization and coherence
B.
ensure your abstract has a clear and logical structure
C.
drop unnecessary information
D.
add important information originally left out
【简答题】What should be described in the abstract? Our______.
【单选题】— What do you think our manager is going to do this afternoon? — He _____ to attend a business meeting. [ ]
A.
supposes
B.
is supposing
C.
is supposed
D.
has supposed
【单选题】When you write an abstract, what points should you keep in mind?
A.
Active voice cannot be used in an abstract.
B.
Main findings should not be included in an abstract.
C.
Make your abstract concise enough to stand on its own.
D.
Acronyms, abbreviations or symbols must be used in an abstract.
【简答题】When should you write the abstract? After you have finished______.
【多选题】A good abstract should ___________.
A.
be unified, coherent, and intelligible to a wide audience
B.
strictly follow the style and formatting guidelines for authors
C.
be error free
D.
excludes any information that is not based on the content of the paper
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