（）是利用金属纽带的拉伸而使指针旋转的原理制成的。
A．钟面千分表
B．圆度仪
C．扭簧测微仪
D．杠杆千分尺
参考答案：C
Shakespeare’s play Hamlet ________ into at least ten different films over the past years. (2013·北京，23)
A．had been made
B．was made
C．has been made
D．would be made
炼焦炉干熄焦有什么特点？
