A上涨
B下降
C大米
D稻谷
()the rise and fall of the tide.
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()(注意) the rise and fall of the tide.
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Pay more attention to the rising and falling of ().
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We should ()the national flag when the sun rises.
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You should hoist the ensign when the sun rises.()
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We must()the mooring lines when the tide rises and falls.
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When you keep a gangway watch, you should ()the mooring lines according to the rise and fall of the tide.
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