两位式薄膜头气动阀执行机构的性能检查标准中压缩空气过滤阀后压力表指示在()MPa,储油杯内油污已被排放干净,压缩空气阀手轮齐全。
参考答案:0.4--0.6
Tom's name is on the book. This book _____ Tom's. [ ]
A. can be
B. will be
C. must be
D. there be
思想史