| Vitamins are organic compounds
necessary in small amounts in the diet for the normal growth and maintenance of
life of animals, including man. They do not provide energy, (21) do they construct or build any part of the body. They are needed for (22) foods into energy and body maintenance. There are thirteen or more of them, and if (23) is missing a deficiency disease becomes (24) Vitamins are similar because they are (25) of the same elements--usually carbon, hydrogen, oxygen, and (26) . nitrogen. They are different (27) their elements are arranged (28) , and each vitamin (29) one or more specific (30) in the body. (31) enough vitamins is essential to life, (32) the body has no nutritional use for (33) vitamins. Many people, (34 A. nevertheless B. therefore C. moreover D. meanwhile [判断题]我国在煤矿安全管理工作中,坚持“谁投资谁受益、谁负责安全”的原则。
A.正确 B.错误 [判断题]热继电器的双金属片弯曲 的速度与电流大小有关,电 流越大,速度越快,这种特性 称正比时限特性。
A.正确 B.错误 [单项选择]财务规划的( )阶段，主要是识别客户目前财务状况中能够影响客户目标实现的优势和劣势，必要时对其目标进行调整。
A. 收集相关数据 B. 实施计划 C. 确定财务目标 D. 分析数据 [单选题]袁家村铁矿浮选药剂NaOH设计的加药位置是（ ）。
A.1#、2#矿浆搅拌槽 B.3%、4#矿浆搅拌槽 C.浮选给矿箱 D.一扫给料箱 [多选题]( ) 按《t油田井下作业井控实施细则》规定,关于现场反循环压井管线试压说法正确的有()。
A. 现场反循环压井管线试压28MPa B.现场反循环压井管线试压35MPa C.稳压10分钟 D.稳压20分钟 E.以不渗漏为合格 我来回答: 提交
最新试题
|
