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Author Question: In progressive forms, it is not necessary to include the complete form of the helping verb be. ... (Read 16 times) |
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About 600,000 particles of skin are shed every hour by each human. If you live to age 70 years, you have shed 105 pounds of dead skin.
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Medication errors are more common among seriously ill patients than with those with minor conditions.
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Every 10 seconds, a person in the United States goes to the emergency room complaining of head pain. About 1.2 million visits are for acute migraine attacks.
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Vampire bats have a natural anticoagulant in their saliva that permits continuous bleeding after they painlessly open a wound with their incisors. This capillary blood does not cause any significant blood loss to their victims.
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After a vasectomy, it takes about 12 ejaculations to clear out sperm that were already beyond the blocked area.
Three principle forms of natural selection: (a) stabilizing selection, (b) directional selection, an
Several species of squirrels have melanistic phases. In large parts of United States and Canada, the