使用EXCEL 2002中“格式”菜单下“单元格”中的“字体”选项，可以调整字形、字号及（）操作。 ["A.设置段落格式","B.设置上下标","C.字符间距","D.打印特殊字符"]
（）by an ice-breaker, it is important to maintain a continuous listening watch on the appropriate VHF channel and to maintain a proper look-out for sound and visual signals. ["which is assisted","that assist you","when you assisted","when being assisting"]
最早提出“丝绸之路”概念的学者是（）。 ["斯文赫定","李希霍芬","司马迁","斯坦因"]
The advantage of geostationary satellites is（）. ["the range of antenna can cover everywhere in the world","we can know the ship’s exact position","that the distress alert can be located as soon as possible","antenna of permanent earth stations may be directed towards fixed points in the sky"]
纸张作为出口商品始于（）。 ["汉代","魏晋南北朝","隋代","唐代"]
板式楼梯的优缺点有哪些？
