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【单选题】

花甲、生蚝、蛤蜊壳等外壳坚硬的海鲜壳,属于哪类垃圾?()

A.
干垃圾
B.
湿垃圾
C.
有害垃圾
D.
可回收物
题目标签:外壳蛤蜊生蚝
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参考解析:
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【单选题】隔爆型外壳的设计中,紧固件应____;材料的含镁量应是____。()

A.
具有防松措施;≤6%
B.
采用细牙螺纹;≤6%
C.
用螺母紧固;≤10%

【单选题】The Rockies, the Alps, the Himalayas -something about these peaks draws us to them. Many of us are simply inspired by their beauty, and some even risk life and limb (生命) to climb them. What enormous f...

A.
People are mysteriously attracted to mountains.
B.
People can climb different mountains every year.
C.
Some mountains rise higher all the time.
D.
Old, new, and ancient mountains exist.