金融互换的种类有哪些。

A. 为调查火因提供可靠的依据
B. 可以弥补现场照相的缺陷和不足
C. 为复查和恢复现场提供参考
D. 可以作为诉讼证据使用

A. 正确
B. 错误

A. To add power to the engine
B. To keep the engine firmly attached to its supporting base
C. To keep moving engine part in their proper relative positions
D. To rotate the crankshaft