Nickel and __________ are the alloying element added in steel to increase its toughness.

Nickel and __________ are the alloying element added in steel to incre

1.	Nickel and __________ are the alloying element added in steel to increase its toughness.
A.	molybdenum
B.	chromium
C.	vanadium
D.	silicon
Answer» E.

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Nickel and __________ are the alloying element added in steel to increase its toughness.

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