The Internet is playing a important part inour daily life. On the net, we could learn aboutnews both home and abroad and some otherinformations as well.We can also make phone calls, send messages by e-mails，go to net schools，andlearn foreign languages by ourselves．Beside，wecan enjoy music，watch sports matches，and play thechess or cards．The net even help us do shopping,make a chat with others and make friends with them．In a word，the Internet has made our life more easier．

使用携带型仪器测量时有哪些要求？