疏水器是蒸汽管网的重要设施，疏水器的检查采用听、摸、看的方法，摸就是用手摸凝结水管道的表面温度，太热则表明系统不通，疏水器可能失灵。
此题为判断题(对，错)。
（）常用于压力较高的工艺设备上。
A、热动力疏水器
B、恒温型疏水器
C、浮筒式疏水器
D、脉冲式疏水器
为保证疏水器的正常工作，必须保证疏水器后的背压以及疏水器正常动作所需要的最小压力△Pmin，则其值不应小于（)kPa。
A．50
B．100
C．150
D．80
The creative shaping process of a technologist's mind can be seen in nearly every artifact that exists. For example, in designing a diesel engine, a technologist might express individual ways of nonverbal thinking on the machine by continually using an intuitive sense of rightness and fitness. What would be the shape of the combustion chamber? Where should the valves be placed? Would it have a long or short piston? Such questions have a range of answers that are supplied by experience, by physical requirement, by limitations of available space, and not in the least by a sense of form. Some decisions, such as wall thickness and pin diameter, may depend on scientific calculations, but the nonscientific component design remains primary.
Design courses, then should be an essential element of engineering curricula. Nonverbal thinking, a central mechanism in engineering design, involves perceptions, which is the special technique of the artists, not the scientist. Because perceptive processes are not assumed to need "hard thinking", nonverbal thought is sometimes seen as a primitive stage in the development of cognitive processes and inferior to verbal mathematical thought.
If courses in design, which in a strongly analytical engineering curriculum provide the background required for practical problem-solving, are not provided, we can expect to encounter silly but costly errors occurring in advanced engineering systems. For example, early modes of high-speed railroad cars loaded with sophisticated controls were unable to operate in a snowstorm because the fan sucked snow into the electrical system. Absurd random failures that plague automatic control systems are a reflection of the chaos that results when design is assumed to be primarily a problem in mathematics.
In the passage, what is the writer primarily concerned with?
A．Identifying the kinds of thinking that are used by technologists.
B．Stressing the importance of scientific thinking in engineering design.
C．Proposing a new role for nonscientific thinking in engineering.
D．Contrasting the goals of engineers with those of technologists.
