沥青混合料厂拌再生时，旧料的掺配比例一般控制在()为宜。
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The center of flotation of a vessel is ().
A. The center of volume of the immersed portion of the vessel
B. The center of gravity of the water plane
C. That point at which all the vertical downward forces of weight are considered to be concentrated
D. That point at which all the vertical upward forces of buoyancy are considered to be concentrated
所谓“至虚有盛候”指的是
A. 虚实夹杂
B. 真虚假实
C. 真实假虚
D. 虚中央实
热爱幼儿教育事业是加强教师职业道德建设的重要内容。()
诚信即指披露的会计数字如实反映现实，公司诚实经营。()
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