实际工程中应用较多的疏水器类型是()。

A.浮筒式

B.热动力式

C.波纹管

D.倒吊桶式

能连续排水的疏水器是（）。

A、浮桶式疏水器

B、浮球式疏水器

C、脉冲式疏水器

D、恒温式疏水器

疏水器安装时，正确的是（）。

A、应安装在便于检修的地方

B、可以安装在管道的最高处

C、疏水器的进出口位置应保持水平，不可倾斜安装

D、疏水器安装时无方向性

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.

如蒸汽疏水器内部完全堵塞，则（）。 

A、蒸汽疏水器处于正常上作状态

B、蒸汽疏水器的阀门无法关闭

C、蒸汽疏水器存在阀门磨损

D、蒸汽疏水器无法动作