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【单选题】
药材的形成层环纹形状是()
A.
环状
B.
略呈方形
C.
类多角形
D.
波状
E.
不规则状
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A.
only on some connecting flights are complimentary seats offered
B.
it's illegal to charge money to get some special seats'
C.
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A.
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B.
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C.
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D.
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A.
3
B.
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C.
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D.
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A.
they are always based on the dreamer's deep feelings
B.
they are expressed in a code only the dreamer can understand
C.
they are always something related to the dreamer's upbringing
D.
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A.
全部均有溃疡病史
B.
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C.
转移性右下腹痛
D.
剑突下突发持续剧痛,很快波及全腹
E.
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