新疆维吾尔自治区一商人准备经郑州到武汉销售哈密瓜,他经过的主要铁路干线有[ ]
A、陇海线 京九线
B、兰新线 陇海线 京广线
C、焦柳线 兰新线
D、京沪线 陇海线
答案:B
—Is that the small town you often refer to?
—Right, just the one____ you know I used to work for years. [ ]
A. that
B. which
C. where
D. what
试述空心玻璃砖的技术性能及其应用范围。