【判断题】As NC machines need a large capital investment, we should efficiently use them
【简答题】从业人员个人卫生做到四勤、四不、要注意。“四勤”是指:勤洗手剪指甲;勤理发洗澡;勤洗衣被褥;勤换工作衣帽;“四不”是指:工作时不留长指甲、不涂指甲油、不戴戒指、不吸烟。“要注意”是指:常戴清洁的工作衣帽、头发臵于帽内、工作前便后()。
【判断题】As NC machines need a large capital investment, we should efficiently use them.
【简答题】We should (large)________ our vocabulary.