56. Manatees eat about 100    英磅   a day.      小题1:__________

57.    等   for her made me angry.              小题2: __________

58. Last Sunday, two kids    拜访  me.         小题3: __________

59. I’m more    外向的    than my sister.        小题4: __________

60. He didn’t know what was    发生   outside.   小题5: __________

测量15V的电压，使用0.5级刻度为150V的电压表比使用1.5级刻度为15V的电压表读数更准确。