题目内容

真菌的营养体和繁殖体是什么？简述它们的作用和类型？

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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

休克时胃肠粘膜较早处于缺血缺氧状态，因此，胃肠粘膜内PH（PHi）可能发现（）。

作物总干重与叶面积之比称为（）。