Which statement about pneumatic systems is true? A. Pneumatic systems generate greater force than hydraulic systems. B. Pneumatic systems are safe to use at any level of pressure. C. Pneumatic systems are more expensive than hydraulic systems. D. Pneumatic systems are cleaner than hydraulic systems.

Explanation:

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true

Explanation:

this is true because it is

key points:

• The Dubai Mall is the largest mall in the world.

• Area : the same as 50 football pitches and more than 1200 shops.

• ground floor have an aquarium, named Dubai Aquarium, the world's largest indoor aquarium.

• aquarium with 33 000 aquatic animals including sharks.

• outside the Mall, have fountains, named Dubai Fountains with water jets of approximately 200 metres long.

• can visit Olympic sized ice-skating rink.