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【单选题】
方程【图片】的所有解( )
A.
1.0000, 3.0000, 1.7321, -1.7321
B.
1.0000, 3.0000, 1.7321i, -1.7321i
C.
1.0000i, 3.0000i, 1.7321, -1.7321
D.
-3.0000i, 3.0000i, 1.7321, -1.7321
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A.
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B.
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【多选题】Choose the points you have heard.
A.
Denmark is one of the happiest countries in the world.
B.
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C.
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D.
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【多选题】Listen to the recording and check the points you have just heard. [音频]
A.
Denmark is one of the happiest countries in the world.
B.
Most Danish people work part time.
C.
Most Danish people pay high taxes.
D.
Most Danish people enjoy the long winters.
E.
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