题目

Is it, in your opinion, possible __________ new measures will be taken to improve the terrible traffic? A. whether                   B. what                 C. when                D. that 答案：D（2013?梧州模拟）如图所示，起瓶器开启瓶盖时，可看作是（　　）A．以B点为支点的费力杠杆B．以B点为支点的省力杠杆C．以A点为支点的费力杠杆D．以A点为支点的省力杠杆