roofs symbolize bamboo shafts, which in turn represent youth and longevity.

The disadvantage of district ventilation is that there are many return air shafts and ventilation equipment.

Shafts are either cold-rolled or forged in sizes from 3 inch to 5 inch.

The disadvantage of district ventilation is that there are many return air shafts and ventilation equipment. A: 正确 B: 错误

The linear motion of a diesel engine piston is converted to the rotary motion required to drive gears， propeller shafts， and generators by the （）.

All shafts are low power output and don't need to set the __________. A: speed of the delta design B: compact robot C: piping lines D: security fence

There are two shafts in torsion with different materials. Knowing that the two have the same diameter and length and are exerted the same torque.Which one is correct in the following statements about the maximum shearing stress and the angle of twist ___.

All deck machinery require routine maintenance work, including splash lubrication for all totally enclosed working parts, lubricating open gears and clutches with open gear compound and ____. A: oiling the bearings with lubricant from the forced feed system B: greasing bearings on the shafts with high pressure guns C: painting the exposed parts with anti-corrosion D: disassembling the moving parts once every two months

A child is sent to the school nurse because, according to his teacher, he’s constantly scratching his head. When the nurse assesses his hair and scalp, she finds evidence of lice. What did she probably see（） A: Flaking of the scalp with pink, irritated skin exposed. B: Small white spots that adhere to the hair shaft, close to the scalp. C: Scaly, circumscribed patches on the scalp, with mild alopecia in these areas. D: Multiple tiny pustules on the scalp with no abnormal findings on the hair shafts.