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【单选题】
对于拱式桥、悬索桥和斜拉桥的叙述中，正确的是（ ）。
A.
简单体系拱桥中拱桥的传力结构与主拱形成整体共同承受荷载
B.
系杆拱桥是有推力的拱式组合体系桥
C.
悬索桥中桥塔的高度主要由桥面标高和主缆索的垂跨比确定
D.
斜拉桥的索塔承受轴力，不承受弯矩
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【单选题】The magnetic compass magnets are acted on by the horizontal component of the Earth’s total magnetic force. This magnetic force is GREATEST at the _________.
A.
north magnetic pole
B.
south magnetic pole
C.
magnetic prime vertical meridian
D.
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【单选题】When did the conversation take place?
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【单选题】听力原文：W: Almost five million people are married each year in the United States. About one in every eight of these weddings takes place in June, the traditional month for weddings. Getting married can b...
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south magnetic pole
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【单选题】The magnetic compass magnets are acted on by the horizontal component of the Earth’s total magnetic force. This magnetic force is GREATEST at the _________.
A.
north magnetic pole
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south magnetic pole
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magnetic prime vertical meridian
D.
magnetic equator
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【单选题】When did the conversation take place?
A.
About five o'clock.
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【单选题】听力原文：W: Almost five million people are married each year in the United States. About one in every eight of these weddings takes place in June, the traditional month for weddings. Getting married can b...
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A.
choir
B.
addiction
C.
indifference
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persecution
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