A. 功率损耗大 B. 切换时间长 C. 所形成的梯度场在成像范围内具有良好的非线形特征 D. 最低程度涡流效应 E. 响应时间要长
A. the ship is made fast B. the ship‟s first line is sent ashore C. the ship is dredging anchor D. the ship‟s pilot disembark
A. 正确 B. 错误