因果分析图是用来（ ）。A.寻找影响质量的主要问题的 B.寻找影响质量的主要原因的###SXB

According to the passage, which of the following relationships between profits and investments in research and development holds true for producers of technologically advanced components?A．Modest investments are required and the profit margins on component sales are lowl.B．Modest investments are required but the profit margins on component sales are quite high.C．Despite the huge investments that are required, the profit margins on components sales are high.D．Because huge investments are required, the profit margins on component sales are low.E．Long-term contractual relationships with purchasers of components ensure a high ratio of profits to investment costs. 点击查看答案

投料试车应在工程竣工验收后进行，由（ ）负责。A.发包人B.承包人C.工程师###SXB#

A.发包人
B.承包人
C.工程师
D.政府有关机构

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