稽查大队开展的稽查工作要坚持稽查与整改完善相结合，稽查与业务辅导相结合，（），稽查与

若求解某个问题的程序反复多次执行，则在设计求解算法时，应重点从（）代价上考虑。

For many years, people () electric cars. However, making them has been more difficult that predicted.

A. had dreamed of

B. have dreamed of

C. dreamed of

D. dream of

离心泵的流量取决于泵的（）。

曲轴箱强制通风