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参考解析：
刷刷题刷刷变学霸
举一反三
【单选题】某轮船速14kn，顺风顺流航行，流速2kn，风使船增速1kn，0600计程仪读数为100'.0，计程仪改正率ΔL=-5%，则2h后相对计程仪读数为()。
A.
129'.5
B.
131'.6
C.
133'.7
D.
135'.8
【单选题】Obtaining Drinking Water from Air Humidity Not a plant to be seen，the desert ground is too dry．But the air contains water，and research scientists have found a (51) of obtaining drinking water from a...
A.
who
B.
where
C.
when
D.
which
【单选题】进入汽包、烟道、压力容器前，应充分通风，使有毒有害气体含量小于规定值，含氧量保持在（ ）。
A.
19.5%～21%
B.
18%～20%
C.
19%～22.5%
D.
16.5%～19%