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245. 銑削斜面其斜度為 1/20,大端尺寸 50mm,小端尺寸 42mm,則其長度應為 (A)160mm (B)180mm (C)200mm (D)220mm 。

246. 銑床銑削斜面的方法,下列何者不適宜? (A)傾斜銑床頭 (B)傾斜工件 (C)傾斜虎鉗 (D)傾斜床台 。

38. Why does vertical farming help reduce transportation emissions? (A) Because it relies on electric tractors instead of diesel ones. (B) Because the crops grown indoors are lighter and easier to transport. (C) Because the food is shipped internationally via zero-emission airplanes. (D) Because the farms are generally located close to where the consumers live.

39. What is identified as the major challenge for adopting vertical farming? (A) The lack of available shipping containers in cities. (B) The high energy consumption and expensive initial setup costs. (C) The poor taste and low nutritional value of the vegetables produced. (D) The severe shortage of water resources in most urban areas.

40. What does the last paragraph suggest about the future development of vertical farming? (A) It is likely to disappear unless traditional farming methods are abandoned. (B) It will mainly benefit small-scale farmers in rural areas. (C) Its wider adoption may be supported by more affordable renewable energy and continued technological advances. (D) It has already become the dominant solution to the global food crisis.

40.同時具有齒輪和皮帶傳達動力特點的機械元件為下列何者? (A) 鏈條 (B) 連桿 (C) 軸承 (D) 摩擦輪。