真菌的营养体和繁殖体是什么？简述它们的作用和类型？
The disadvantage(s) of using web lashing on light vehicles aboard Ro-Ro vessels is that it（）.
A. deteriorates in sunlight
B. cuts on sharp edges
C. is vulnerable to damage and pilferage
D. All of the above
Which of the listed devices would be installed at a control system air pressure reducing station?（）
A. Moisture separator
B. Vacuum breaker
C. Lubricator
D. Non-return valve
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