用于高原抽油机时,如果冲次低于1次/分,用死点开关无法保证冲刺周期、光杆位移测量准确。()
参考答案:错
35. The manager came over and asked the customer how ___________.
A.did the quarrel come about
B.does the quarrel come about
C.the quarrel has come about
D.the quarrel had come about
下列对历史名人称谓的解释,正确的有()。
A.柳柳州指的是柳宗元
B.王临川指的是王勃
C.袁项城指的是袁世凯
D.杜工部指的是杜牧
E.王右丞指的是王维