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【单选题】
正铲挖土机的特点是( )
A.
前进向上，强制切土。
B.
后退向下，强制切土。
C.
后退向下，自重切土。
D.
前进向上，自重切土。
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Several drivers were killed in the accident.
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【单选题】What happened during the agricultural expansion in the southern Great Plains?
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【单选题】What happened during the Third Century Crisis?
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Rural population in provinces distanced from the metropolis
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【单选题】What happened during the War of 1812?
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Uncle Sam became a national symbol.
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Uncle Sam Wilson and his brother were recruited as army officers.
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【单选题】广义地讲，爆炸是物质系统的一种极为迅速的物理或化学能量释放或转化的过程，是系统蕴藏的或瞬间形成的大量能量在有限的体积和极短的时间内，骤然释放或转化的现象。爆炸现象的最主要特征是（ ）。
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爆炸过程持续进行
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【单选题】What happened during the past four months?
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The patient has visited several doctors.
B.
The patient' s company has undergone an integration.
C.
The patient' s company has dismissed several employees.
D.
The patient' s company has moved into a new building.
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【多选题】What happened during Yu’s flood taming?
A.
He met Nüjiao at Tushan and married her.
B.
Three times he passed his home,but he did not have time to visit his wife.
C.
His wife turned herself into a rock.
D.
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周围介质发生震动
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相关题目：
【单选题】广义地讲，爆炸是物质系统的一种极为迅速的物理或化学能量释放或转化的过程，是系统蕴藏或瞬间形成的大量能量在有限的体积和极短时间内，骤然释放或转化的现象。爆炸现象的最主要特征是（）。
A.
爆炸过程持续进行
B.
爆炸点附近压力急剧升高
C.
周围介质发生震动
D.
温度显著升高
查看完整题目与答案
【单选题】What happened during the Mexican Grand Prix?
A.
Several drivers were killed in the accident.
B.
There was a multiple motor vehicle collision.
C.
His car ran into the car in front of him.
D.
His car was damaged but he wasn't hurt.
查看完整题目与答案
【单选题】What happened during the agricultural expansion in the southern Great Plains?
A.
People improved the soil by planting wheat.
B.
Raising cattle and other livestock became less common.
C.
Most of the landowners became farmers.
D.
Much of the grassland was destroyed.
查看完整题目与答案
【单选题】What happened during the Third Century Crisis?
A.
Rural population in provinces distanced from the metropolis
B.
Huns conquered Byzantium
C.
Urbanization achieved higher level and majority of population moved to cities
D.
Elementary education became mandatory for population in provinces
查看完整题目与答案
【单选题】What happened during the past four weeks?
A.
The patient has visited several doctors.
B.
The patient's company has undergone an integration.
C.
The patient's company has dismissed several employees.
D.
The patient's company has moved into a new building.
查看完整题目与答案
【单选题】What happened during the War of 1812?
A.
Uncle Sam became a national symbol.
B.
Uncle Sam Wilson and his brother were recruited as army officers.
C.
Americans' interest in their national identity was renewed.
查看完整题目与答案
【单选题】广义地讲，爆炸是物质系统的一种极为迅速的物理或化学能量释放或转化的过程，是系统蕴藏的或瞬间形成的大量能量在有限的体积和极短的时间内，骤然释放或转化的现象。爆炸现象的最主要特征是（ ）。
A.
爆炸过程持续进行
B.
爆炸点附近压力急剧升高
C.
周围介质发生震动
D.
温度显著升高
查看完整题目与答案
【单选题】What happened during the past four months?
A.
The patient has visited several doctors.
B.
The patient' s company has undergone an integration.
C.
The patient' s company has dismissed several employees.
D.
The patient' s company has moved into a new building.
查看完整题目与答案
【多选题】What happened during Yu’s flood taming?
A.
He met Nüjiao at Tushan and married her.
B.
Three times he passed his home,but he did not have time to visit his wife.
C.
His wife turned herself into a rock.
D.
When he was cutting the most difficult mountain, he turned himself into a tiger.
查看完整题目与答案
【单选题】广义地讲，爆炸是物质系统的一种极为迅速的物理或化学能量释放或转化的过程，是系统蕴藏的或瞬间形成的大量能量在有限的体积和极短的时间内，骤然释放或转化的现象。爆炸现象的最主要特征是（）。
A.
爆炸过程持续进行
B.
爆炸点附近压力急剧升高
C.
周围介质发生震动
D.
温度显著升高
查看完整题目与答案