- How would one be exposed to carbon tetrachloride?

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What number should be added to the expression x^2-6× to change it into a perfect square Trinomial? 9 36 12 3? Is it necessary to do ultrasonic test if DP test is O.K for a welded joint? Lines y=mx+2 and y=5x-9 intersect at an acute angle whose tangent is 2/5 (2 over 5) Find the possible values of m .? Are uncles and aunties close family in a relation wise? What is the difference between incident ray and refracted ray?