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【简答题】
一台额定频率为60HZ的电力变压器接于频率为50HZ,电压为此变压器5/6倍额定电压的电网上运行,此时变压器励磁电抗 。( 填写“增大” 或“减小”或“不变”)
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【单选题】送乘坐国际航班离境的团队,在( )陪同人员可以离开机场。
A.
飞机起飞后
B.
旅游团进入隔离区后
C.
办完各种手续后
D.
旅游团登机后
【简答题】完形填空。 Tom and his sister 1 a big house. The house is 2 the foot of 3 hill. Near 4 there is a school. There 5 four people in their family. Their father is a farmer. He has a 6 and works 7 it all day. T...
【简答题】阅读理解。 Sometimes you make a wish, but when it comes, you decide you don't want it. That's what happened with Micky's 'birthday wish'. Our family tradition is that you make a wish before you blow out th...
【单选题】汽包锅炉汽压降低时,具体调节措施为:
A.
先增给水,再增风、增燃料
B.
先增燃料,再增风、增给水
C.
先增燃料,再增给水、增风
D.
先增风,再增燃料、增给水
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A.
穿透性
B.
感光作用
C.
荧光作用
D.
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E.
电离效应
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【单选题】与放射治疗有关的X线特性是
A.
穿透性
B.
感光作用
C.
荧光作用
D.
生物效应
E.
电离效应
【简答题】完形填空。 My husband (丈夫) had a hard life when he was young. He didn't have a birthday party 1 I had the first one for him, on his 36th birthday. He loved the chocolate cake our daughter made for 2 . He s...
【单选题】(2017)沥青混合料空隙率偏小,对沥青路面可能带来的问题是 ( )。
A.
耐久性变差
B.
高温抗车辙能力较低
C.
水稳性不好
D.
低温环境易于开裂
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A.
hardly
B.
luckily
C.
sincerely
D.
totally
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