單項選擇題
A.提高 B.降低 C.持平
A.焊接 B.螺絲連接 C.卡爪壓接
A.3 B.4 C.5
A.50米 B.80米 C.100米
A.80% B.90% C.100%
A.1% B.3% C.5%
A.2% B.3% C.5%
A.70% B.80% C.90%
A.機頭 B.機尾 C.過橋
A.天 B.周 C.旬 D.班
A.5 B.10 C.15