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Q7: The asteroids are probably similar in composition
Q11: Bases do not<br>A)taste bitter.<br>B)turn red litmus to
Q15: Birds are descended from<br>A)mammals.<br>B)dinosaurs.<br>C)fish.<br>D)insects.
Q15: According to the uncertainty principle, it is
Q17: The number of galaxies in the universe
Q19: According to the general theory of relativity,
Q22: The world's largest importer of oil is<br>A)the
Q29: The radiation dosage due to cosmic rays
Q31: The electron structures of atoms never emit<br>A)gamma
Q47: A temperature of 20<sup> <span class="ql-formula"