在安全生产监督程序中，对作业场所的监督检查程序有哪些？

微分方程y"-2y’+y=0的通解是______。

出口清关责任由买方承担的贸易术语是（）

A.FCA

B.FOB

C.EXW

D.FAS

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

若保持1/2标准转弯率转弯，转过90°需要（）。

A.30秒

B.60秒

C.90秒