脱硫操作时，加纯碱和PDS要有定的要求，碱少而PDS多，则耗（）多。 ["PDS","碱","酸","水"]
简述会展项目经理的权力。
有一对夫妇色觉正常，他们的父亲均是色盲，母亲正常，那么他们的儿子患色盲比率（） ["0.5","0.25","0.333","0.125"]
脱硫操作时，若加大PDS滴加量后H2S含量仍超高，则可能是PH值（）。 ["偏低","偏高","过高","不影响"]
The Charterers to have option of using Owners’ bunker contracts. This sentence indicates that（）. ["The Charterers should sing new bunker contract with oil chandlers","The Charterers can use the bunker contracts signed by the Owners with oil chandlers","The Charterers shall not sign bunker contracts with oil chandlers","The Charterers shall sign bunker contracts with oil chandler"]
简述会展项目经理的职责。
