轴流转桨式水轮机结构复杂,成本高,转轮汽蚀没有混流式严重。
参考答案:错
In the context of companies in fi nancial diffi culty, distinguish between and explain the operation of:
(b) administration. (6 marks)
切门时,如车门无法关闭,手动也推不动,此时应()手动关门后切门。
A.使用紧急拉手
B.使用门控旁路
C.关闭S4车门电源开关