教师的奉献精神就是要把教育事业看成一件大事来做，要认定教育是大有作为的事情，不是一时，而是永久有益于世的。
参考答案：对
The major problem with E-mail is that it is (71) easy to use that people can become (72) with messages (73) they can possibly answer in a day. In addition, mail boxes require some management to (74) messages or archive those that might be required later. Senders don’t always know about your E-mail backlog and often send (75) messages.
A．more than
B．than
C．that
D．which
电力线路
