小题1:If you learn to    difficulties, you will be the winner in life. (克服)

小题2:I often have a glass of        and an egg for breakfast. (甜牛奶)

小题3: People are not allowed to       in a museum.(拍照)

小题4:     is becoming more and more serious in today’s world. (水污染)

小题5:As students, we should study hard,     it’s important for us to gel on well with others. (同时)

画出万用电表的简单测量原理（指针式）。万用电表的简单测量原理。