Explanation

When the subject of the sentence is the doer, the verb is in Active Voice. When the subject of the sentence is the receiver of the action, the verb is in Passive Voice. 

Here, the subject 'the enemy' performs the action of defeating. If the given sentence is changed into passive voice, then the subject in the active voice becomes object in the passive voice.. Word 'by' is introduced. To convert Present Perfect into passive form, we use has/have + been + 3rd form of the verb. So, correct formation is:

New subject (Our army) + verb (has been defeated) + by + object (our enemy).

Explanation

The motherboard accommodates the central processing unit (CPU), random access memory (RAM), expansion slots, heat sink and fan assembly, basic input/output system (BIOS) chip, chipset, and the circuitry that interconnects the motherboard components.

Explanation

A comment is a note or annotation that an author or reviewer adds to a document.

Word displays the comment in a balloon in the margin of the document or in the Reviewing Pane.

Explanation

tank volume 38.4 cu m=38400 l
3/4 full=38400 x 3/4=28800 l
add 4000lto 28800=32800l
32800/38400= .854 fll
tank 4,8 m tall x 854 current water level= 4.1 m depth of water

Explanation

(x-5)/x

(x-4)/(x+1)=2/3 

2x+2=3x-12

x-12=2

x=14

10/15=2*5/(3*5)=2/3 

the origional fraction is (14-5)/14=9/14

Explanation

Big Ben is a clock at British parliament building.

Location: London, England 

Architect: Augustus Pugin

Height: 96 m 

Explanation

Khunjerab Pass is a 4,693-meter-high mountain pass.

Strategic position on the northern border of Pakistan and on the southwest border of China.

Elevation: 4,693 m

Location: Hunza Pakistan - administered Gilgit–Baltistan / Xinjiang, China

Range: Karakoram

Explanation

The students learn poems by heart

Explanation

Explanation

Desert  ریگستان

fertile زرخیز کرنا