汽轮机通流部件结垢的主要标志是什么?
参考答案:
(1)监视段压力超限;
(2)轴向推力增大;
(3)蒸汽品质不合格。
()是针对工程风险的共性制定的,为完整的合同条款。
A.一切险条款
B.列明风险条款
C.主条款
D.特别条款
Each of them has to write a __________ composition every two weeks.[ ]
A. four-hundreds-words
B. four-hundred-words
C. four-hundred-word
D. four hundred words