减少预精馏塔顶冷凝器的冷剂量,对预精馏塔的影响是()。
A. 回流量下降
B. 塔压上升
C. 塔釜液位上升
D. 尾气量增加
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将产品卖给最终客户,这是促销最基本的职能和作用。
A. 正确
B. 错误
某患者尿糖检查为阳性(+),诊断糖尿病最有价值的指标为()
A. FPG6.1mol/L
B. 2小时PG7.8mol/L
C. OGTT减低
D. 血清胰岛素为14mU/L
E. 空腹C-肽为1.0nmol/L
In modern linguistics, speech is regarded as more basic than writing, because ()
A. in linguistic evolution, speech is prior to writing
B. speech plays a greater role than writing in terms of the amount of information conveyed
C. speech is always the way in which every native speaker acquires his mother tongue
D. All of the above
某公司购入500吨棉花,价格为13400元/吨,为避免价格风险,该公司以14200元/吨价格在郑州商品交易所做套期保值交易,一棉花3个月后交割的期货合约上做卖出保值并成交。2个月后,该公司以12600元/吨的价格将该批棉花卖出,同时以12700元/吨的成交价格将持有的期货合约平仓。该公司该笔保值交易的结果为()元。(其他费用忽略)
A. 盈利150000
B. 亏损150000
C. 盈利350000
D. 亏损350000