仪表控制气源系统管路上的隔离阀门宜采用低合金钢截止阀或球阀。
参考答案：错
解析：仪表控制气源系统管路上的隔离阀门宜采用不锈钢截止阀或球阀。
There were two large buildings, _____ stands nearly a hundred feet high. [ ]
A. the larger
B. the larger of them
C. the larger of whom
D. the larger of which
同一发动机的标定功率值可能会不同。
