桅杆高于（）m必须安装脚梯和角铁，便于维护和馈线卡子的固定 ["1","2","3","4"]
一位古诗人在《题昭君出塞图》中写道：“草黄沙白马如云，落日悲笳处处闻，此去妾心终许国，不劳辛苦汉三军”。从诗中可以看出作者肯定王昭君出塞是因为（）。 ["昭君出塞不畏艰难","昭君出塞是为了个人幸福","昭君出塞是为了国家利益","昭君出塞加强了汉与匈奴的关系"]
What purpose would you achieve by enabling the block change tracking feature？（） [" Eliminate the necessity for backups."," Perform optimized image copy backups."," Perform optimized incremental backups."," Enable checkpoint （CKPT） to perform checkpointing at every block change."," Enable database writer （DBWn） to write changed blocks to data files faster."]
固液界面上发生粘附的条件有哪些？
简述往复式压缩机连杆螺栓的更换条件。
余华的先锋小说有哪些不同的类型？举例分析其成败得失。
