In the following essay,each blank has four choices．Choose the best answer and writedown on the answer sheet．
Communicating via E—mail is by far the most common Internet activity．You can (71) with anyone in the world who has an Internet address or E—mail (72) with a systemconnection to the Intemet．All you need is (73) the Internet and an E—mail program．Two ofthe most widely used E．mail programs are Microsoft’s (74) and Netscape’S Navigator．Atypical E．mail message has three basic (75) ：header，message，and signature·

A．Yahoo
B．Explorer
C．Foxmail
D．Outlook Express

下列属于高新技术企业认定应提交的申请资料的有（）。

A.高新技术企业认定申请书

B.企业营业执照副本、税务登记证（复印件）

C.企业职工人数、学历结构以及研发人员占企业职工的比例说明

D.具有资质的中介机构鉴证的企业近三个会计年度研究开发费用情况表（实际年限不足三年的按实际经营年限），并附研究开发活动说明材料