●练习不是机械地重复有的教师指导学生练习,只强调练,认为功夫是练出来的,练到家了,功自然就成了。这样,学生目的不明,思想不清。且一味机械重复,使学生感到枯燥,产生厌倦。如仪表专业的锡焊练习,是仪表工作人员的一项基本功。有的教师在指导时,认为保证了焊接时间,达到了焊点要求数,学生的基本功就过了关。结果,学生虽然也装响了收音机,却仍不清楚烙铁的握法,焊接的程序,以及如何上锡,如何防止氧 ● The practice is not to mechanically repeat some teachers to instruct students to practice, only to emphasize practice, and to think that kung fu is practiced. When you reach home, the work is naturally completed. In this way, the purpose of the students is unknown and their thinking is unclear. And blindly mechanical repetition makes students bored and bored. Such as instrument professional soldering practice, is a basic work of instrumentation staff. When some teachers were instructing, they believed that the welding time was guaranteed and the number of welding spot requirements was reached. The basic skills of the students were then passed. As a result, although students also installed radios, it was still unclear how the soldering iron was held, the soldering procedure, and how to apply tin. How to prevent oxygen