灰铸铁的金相组织由金属基体和渗碳体所组成。
参考答案:错
The parents suggested ________ in the hotel room but their kids were anxious to camp out during the trip.
A.sleep
B.to sleep
C.sleeping
D.having slept
以下选项中,对细排给据邮件工作内容描述正确的有()。
A、给据邮件细排结束后,要及时将投递量填入投递业务量登记表内
B、将细排好的给据邮件按照投递顺序插入在平信内,以便区分于平信
C、大件挂号印刷品可用硬质卡片代替排入平信内
D、如本段给据邮件较多,可在给据邮件反面按照投递邮件清单前后页数编上顺序号码