油气长输管道穿（跨）越大中型河流、铁路、二级及以上公路高速公路的管段应（）。
A.不试压
B.与相邻管段一并试压
C.单独试压
参考答案：C
根据句意及所给单词的首字母提示填空。
1. The start of the New Year is the b of a l0-day celebration.
2. Halloween is very popular in the w countries.
3. He cut his finger with a s knife.
4. The old man lives here. He is the o of this house.
5. Rice dumplings are the t food of Chinese for the Dragon Boat Festival.
分析下列零件结构工艺正确性，如不合理，画出正确结构。
