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【单选题】
研究构件或其一部分的平衡问题时,可以采用构件变形前的原始尺寸进行 计算,这是因为采用了( )。A.
均匀件假设
B.
连续性假设
C.
小变形假设
D.
各向同性假设
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皮皮学刷刷变学霸
举一反三
【单选题】下列说法正确的是( )。
A.
生态监测是比生物监测更复杂、更综合的一种监测技术
B.
生态监测重点是放在生态系统的生物反应上
C.
生态监测是利用“生态”来作“仪器”进行监测环境质量
D.
上述说法都对
【简答题】A fall B decrease C refuse D rise
【简答题】You ______ her at the beginning, but now it is too late． A．ought to refuse B．have ought refuse C．ought to have refused D．ought have refused
【单选题】A refuse collection becomes a "sanitary engineer" because ______.
A.
"refuse collector" is a job people don't like to do
B.
"refuse collector" is too formal
C.
people enjoy freedom in their choice of words
D.
the elegancy of language is admired by the American people
【简答题】说明生态监测与生物监测的关系。
【单选题】Which grasslands are widely introduced in this unit?
A.
Hulunbuir grassland.
B.
Both the Hulunbuir and Xilingol grasslands.
【简答题】宏观生态监测和微观生态监测两者之间有何区别与联系?
【单选题】The environmentalists said wild goats’ __________ on the vast grasslands was a good indication of the better environment.
A.
escape
B.
absence
C.
attendance
D.
appearance
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