There is a rectangular gate with a width 10 meters and a height 6 meters. When the upper boundary of the gate is [img=11x19]1803e24906a47de.png[/img] meters under the water surface, the water pressure on the gate is just twice that of the initial pressure. Then [img=30x19]1803e2490f6ee99.png[/img]（ ）meters.
A: 4
B: 2
C: 1
D: 3
A: 4
B: 2
C: 1
D: 3
D
举一反三
- Elephant Eye Cave has an average height of roughly 3 meters, varies in width from 5 to 10 meters.( )
- The maximum height _________ the grotto is 40 meters, and the width is 30 meters, while the minimum height of the grotto is less than an inch. A: with B: of C: on
- You are connecting a computer to a projector that is 9 meters away. The standard VGA cable you have is only 2 meters long.Which of the following cables can be used to connect the remaining 7 meters? They are all 8 meters long.[img=375x262]17e0aaa3bac0a7c.png[/img] A: A B: B C: C D: D
- The city wall of Pingyao Ancient City is 46 kilometers. It is about 10 meters high and 3 to 6 meters wide on top.
- The swimming pool is 80 meters _____ and 40 meters _______. A: in long; in wide B: in length; in width C: long; in width D: in length; wide
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- 0
The height of a body moving vertically is given by [img=320x86]1803474f8dad77c.png[/img], with s in meters and t in seconds. The body’s maximum height is ( ) A: [img=34x54]1803474f95e9038.png[/img] B: [img=46x92]1803474f9e798e4.png[/img] C: [img=94x92]1803474fac22f26.png[/img] D: 0
- 1
The highest peak of Wumeng Mountain, Jiucaiping is at an altitude of _______ .（ ） A: 2700 meters B: 2,800 meters C: 3,000 meters D: 2,900 meters
- 2
The tunnel is only ______. It's not very long.[音频] A: 8 meters B: 80 meters C: 18 meters D: 800 meters
- 3
设随机变量[img=75x25]1802d5ab02ff46a.png[/img]，且已知 E[(X - 1)(X + 2)] = 6，则[img=30x19]1802d5ab0aa816f.png[/img] A: 1 B: 2 C: 3 D: 4
- 4
He has a room 5 meters long and 3 meters wide________.