50. 經營鑄造工廠時,始終應維持之最高經營準則為:(A)品質第一 (B)效率第一 (C)安全第一 (D)利潤第一

6. Which is not one of instructions for safety precautions described in the working manual？ (A) Precautions for handling the low temperature or low pressure spot. (B) Installing fire extinguisher and first aid kit. (C) Be cautions with the asbestos dust. (D) Precautions for handling the high temperature or high pressure spot.