【判断题】关于农产品中农药和兽药的残留超标问题,其中农药中毒对人体的危害更为严重。
【单选题】Tom graduated from college at a very young ago. Oh,he ___ have been a very smart boy then.
【判断题】(WORD文字处理)当打开了现有的数据源或建立了新数据源后,数据源文件就会和主文档文件连接在一起。
【单选题】一个体重50公斤的人,体内血量约为______毫升。
【单选题】Tom graduated from Oxford University and has taught English here since then.