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【多选题】
某空调冷水系统采用两台蒸汽压缩式冷水机组, 配置的一次定流量循环水泵, 冷却水泵与冷却塔并联运行。 当因气候变化, 部分负荷运行时, 仅有一台机组与其相匹配的水泵等运行。 实现节能, 并保障运行合理的做法下列哪几项?A.
关闭不运行冷水机组的冷却水进机组管路阀门
B.
关闭不运行冷水机组的冷水进机组管路阀门
C.
始终使冷却水通过两台冷却塔实现冷却
D.
两台冷却塔的风机保持全部运行
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【单选题】男,40岁。3小时前左上腹被汽车门撞伤,即出现腹部剧痛、心慌、头晕、呕吐,查体:面色苍白、出冷汗,P120次/分,Bp80/50mmHg,腹稍胀,腹式呼吸减弱,腹膜刺激征(+),以左上腹为著,移动性浊音(+),肠鸣音消失,肝浊音界存在。对协助诊断有意义的检查是( )
A.
B超
B.
肺功能测定
C.
血常规
D.
腹腔穿刺
E.
X线
【简答题】刷牙的频率以每()一次为基准。
【简答题】A．He may enjoy the beautiful scenery there. B．He wants to visit his relatives there. C．He may make a lot of friends there. D．He may do some market research there.
【单选题】男,40岁。3小时前左上腹被汽车门撞伤,即出现腹部剧痛、心慌、头晕、呕吐,查体:面色苍白、出冷汗,P120次/分,Bp80/50mmHg,腹稍胀,腹式呼吸减弱,腹膜刺激征(+),以左上腹为著,移动性浊音(+),肠鸣音消失,肝浊音界存在。该患者诊断为闭合性腹部损伤,考虑最可能损伤的脏器为( )
A.
肝脏
B.
脾脏
C.
胃
D.
胰腺
E.
肾脏
【简答题】A．Not to visit his class. B．The class objects the visit. C．To visit his class next Monday. D．The students will have their examination next Monday.
【单选题】Witkins rightly argues that population may be deemed a valid sustainable development indicator—that sustainability can only be implemented by limiting population below the carrying capacity of the Ear...
A.
What accounts for the difference in rates of consumption in certain countries?
B.
What is the numerical factor by which per capita energy consumption exceeds physiological energy requirements?
C.
Which countries tend to have more sensitive ecosystems, those with small or large populations?
D.
What factor in calculating sustainability has Witkins neglected to consider in his theory of global development?
E.
What evidence is there for the notion that higher rates of consumption can be more important than population rates in calculating the impact of development?
【简答题】用于选拔性和竞赛性活动的评价属于绝对评价。（ ）
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