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【单选题】
对于韧性较好的宝石饰品,由于其具有良好的抗破裂的性质,因此在佩戴与保管时无需特殊对待,因此在保管与收藏方面,应注意()。A.
高脆性宝石镊取需轻拿轻放
B.
高脆性首饰可与硬物接触
C.
高脆性宝石不需要分开保管
D.
高脆性宝石不需要防磨损
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【简答题】In “Easter Wings”, the foot pattern ofline 6-10 goes like this____.A. Tetrameter,trimester, dimeter, pentameter and monometer B. Monometer,dimeter, trimester, tetrameter and pentameter C. Pentameter,m...
【单选题】Which of the following is NOT true according to the passage?
A.
Bird wings have to support the bird.
B.
Bird wings must act as the bird's engine.
C.
Airplane's wings must act as the airplane's engine.
D.
Similar wing shapes in aircraft and birds produce similar flight capabilities.
【单选题】Which of the following is not true according to the passage?
A.
Bird wings have to support the bird.
B.
Bird wings must act as the bird's engine.
C.
Airplane's wings must act as the airplane's engine.
D.
Similar wing shapes in aircraft and birds produce similar flight capabilities.
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