样式表文件的扩展名是（）。
（）应当装设安全联锁装置。 ["蒸压釜","储气罐","消毒锅","灭菌锅"]
What is the purpose of importing from an export，and specifying that no rows be imported and that the output goes to a log file？（） ["To verify space requirements in the target database before importing.","To generate the SQL for the DDL operations that would occur during import.","To check character set compatibility between the export file and the target database.","To check for integrity constraint violations that would occur in the target database."]
在对触电者实行人工呼吸过程中要注意快慢，节奏要均匀，一般以每分钟（）为宜。 ["1～2次","5～10次","14～16次","20～30次"]
链接一个外部样式表文件可以记为：
如何进行吸水池收油？
