某校师生积极为玉树地震灾区捐款捐物，在得知灾区急需帐篷后，立刻到当地的一家帐篷厂采购，帐篷有两种规格，可供3人居住的小帐篷，价格每顶160元；可供10人居住的大帐篷，价格每顶400元．学校花去捐款96000元采购这两种帐篷，正好可供2300人居住．求该校采购了多少顶3人小帐篷，多少顶10人住的大帐篷．

The company should establish procedures to ensure that（）related to safety and protection of the environment are given proper familiarization with their duties.Instructions which are essential to be provided prior to sailing should be identified,documented and given.

A.New personnel

B.Personnel transferred to new assignments

C.All crewmembers

D.New personnel and Personnel transferred to new assignments