悬铃木的花序类型属于() ["总状花序","头状花序","穗状花序","隐头花序"]
在关闭数据库时,要求当前尚未处理完成的事务立即停止处理,未完成事务进行回滚。可采用下列哪种方式() [" SHUTDOWN"," SHUTDOWN ABORT"," SHUTDOWN IMMEDIATE"," SHUTDOWN NORMAL"," SHUTDOWN TRANSACTIONAL"]
删除一张幻灯片可以用快捷键Ctrl+D实现。
叶到秋季时会变红的植物是() ["络石","常春藤","爬山虎","无花果"]
民航客机的国际航班一般都飞行在1万米的高空。这个说法对吗?
单相感应电容式电动机工作原理是什么?