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【单选题】
有两列频率相同、振动方向相同、波长相同、相位差恒定,但振幅不同的波,在同一直线上沿相反方向进行,则它们( )
A.
不是相干波，但可以形成驻波
B.
是相干波，但不能形成驻波
C.
不是相干波，也不能形成驻波
D.
是相干波，也能形成驻波
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举一反三
【单选题】The travelers checks should be in dollars in the US because______.
A.
only a few banks deal with travelers checks
B.
only a few banks deal with foreign currencies
C.
traveler checks are insured against loss
D.
you can exchange the checks not in dollars easily
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【简答题】茎上着生叶的部位称为 _____ ,两个节之间的部分称为 _____ 。银杏植株具有两种枝条,节间显著伸长的枝条称为 _____ ;节间短缩甚至难于分辨的枝条称为 _____ 。叶脱落后在茎上留下的叶柄痕迹,称为 _____ 。叶痕内的点线状突起称为 _____ 。顶芽开展时,外围的芽鳞片脱落后留下的痕迹称为 _____
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【单选题】Only can a(n)______worker deal with the situation.
A.
experienced
B.
experimented
C.
influenced
D.
high
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【单选题】Employees from each department elect a to the meeting.
A.
receptionist
B.
representative
C.
florist
D.
tourist
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【简答题】叶脱落后在枝条上留下的痕迹称为 。
查看完整题目与答案
【单选题】The travelers checks should be in dollars in the US because______.
A.
only a few banks deal with travelers checks
B.
oniy a few banks deal with foreign currencies
C.
traveler checks are insured against loss
D.
you can exchange the checks not in dollars easily
查看完整题目与答案
【单选题】( ) 14.进行性血胸的紧急处理应
A.
给氧
B.
剖胸探查
C.
迅速封闭胸壁伤口
D.
抗感染
E.
穿刺排气减压
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【单选题】The deal is a ______ of SISSO's growth philosophy.
A.
guarantee
B.
symbol
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【单选题】The United Nations believes that the only way to prevent worse hurricanes is to deal with global warming.
A.
Y
B.
N
C.
NG
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【单选题】They were set to make a tremendous profit on the deal, but only made a ()one at last.
A.
separate
B.
broken
C.
fractional
D.
large
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【单选题】The travelers checks should be in dollars in the US because______.
A.
only a few banks deal with travelers checks
B.
only a few banks deal with foreign currencies
C.
traveler checks are insured against loss
D.
you can exchange the checks not in dollars easily
查看完整题目与答案
【简答题】茎上着生叶的部位称为 _____ ,两个节之间的部分称为 _____ 。银杏植株具有两种枝条,节间显著伸长的枝条称为 _____ ;节间短缩甚至难于分辨的枝条称为 _____ 。叶脱落后在茎上留下的叶柄痕迹,称为 _____ 。叶痕内的点线状突起称为 _____ 。顶芽开展时,外围的芽鳞片脱落后留下的痕迹称为 _____
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【单选题】Only can a(n)______worker deal with the situation.
A.
experienced
B.
experimented
C.
influenced
D.
high
查看完整题目与答案
【单选题】Employees from each department elect a to the meeting.
A.
receptionist
B.
representative
C.
florist
D.
tourist
查看完整题目与答案
【简答题】叶脱落后在枝条上留下的痕迹称为 。
查看完整题目与答案
【单选题】The travelers checks should be in dollars in the US because______.
A.
only a few banks deal with travelers checks
B.
oniy a few banks deal with foreign currencies
C.
traveler checks are insured against loss
D.
you can exchange the checks not in dollars easily
查看完整题目与答案
【单选题】( ) 14.进行性血胸的紧急处理应
A.
给氧
B.
剖胸探查
C.
迅速封闭胸壁伤口
D.
抗感染
E.
穿刺排气减压
查看完整题目与答案
【单选题】The deal is a ______ of SISSO's growth philosophy.
A.
guarantee
B.
symbol
查看完整题目与答案
【单选题】The United Nations believes that the only way to prevent worse hurricanes is to deal with global warming.
A.
Y
B.
N
C.
NG
查看完整题目与答案
【单选题】They were set to make a tremendous profit on the deal, but only made a ()one at last.
A.
separate
B.
broken
C.
fractional
D.
large
查看完整题目与答案