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As stressed by Zamakhshari, the particle am which introduces this sentence has not, as is so often the case, an interrogative sense ("is it that..."), but is used here in the sense of bal, which in this instance may be rendered as "and yet".
Lit., "they have taken unto themselves deities from the earth", i.e., from among the things or beings found on earth: an expression which alludes to all manner of false objects of worship - idols of every description, forces of nature, deified human beings. and. finally, abstract concepts such as wealth, power, etc.
The different kinds of false gods whom people raise from their imagination are now referred to. In verses 21-23, the reference is to the gods of the earth, whether idols or local godlings, or deified heroes, or animals or trees or forces of the nature around us, which men have from time to time worshipped. These, as deities, have no life except what their worshippers give to them.
The answer of course is "no". No one but Allah can raise the dead to life. The miracle in the story of Jesus (iii. 49 and v. 113) was "by Allah's leave". It was a miracle of Allah, not one of Jesus by his own power or will.