题目

81.  Nowadays many high school students ________________ listening to popular music. 82.  Don’t waste resources _________________ water and electricity. 83.  British English _____________ American English in some ways. 84.  They had to put off the sports meeting __________________ the heavy rain. 85.  Since I __________________ college, I have been teaching English in the school. 86.  Once you have decided to do something, don’t ________________ easily. Just go ahead. 87.  The little hero would rather die than ______________ to the enemy.. 88.  When I was reading an Englis（1）如图为一正在测量中的多用电表表盘．a．如果是用直流10V档测量电压，则读数为6.56.5V．b．如果是用直流5mA档测量电流，则读数为3.233.23mA．c．如果是用×100Ω档测量电阻，则读数为800800Ω．（2）用×10挡测量某电阻时，操作步骤正确时，发现指针的偏转角很小，那么接下来的操作步骤应该依次为：①换用×100挡换用×100挡，②红黑表笔短接调零红黑表笔短接调零，③表笔与被测电阻相连读数表笔与被测电阻相连读数．④测量结束后应将选择开关拨到OFFOFF或者交流最大挡．交流最大挡．．（3）无论用多用电表进行何种（直流）测量，电流都应该从红红表笔流入多用电表经黑黑表笔流出电表．