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Author Question: As ________ increases, cause-and-effect relationships become less clear. (Read 32 times) |
Each year in the United States, there are approximately six million pregnancies. This means that at any one time, about 4% of women in the United States are pregnant.
More than 2,500 barbiturates have been synthesized. At the height of their popularity, about 50 were marketed for human use.
Most strokes are caused when blood clots move to a blood vessel in the brain and block blood flow to that area. Thrombolytic therapy can be used to dissolve the clot quickly. If given within 3 hours of the first stroke symptoms, this therapy can help limit stroke damage and disability.
Famous people who died from poisoning or drug overdose include, Adolf Hitler, Socrates, Juan Ponce de Leon, Marilyn Monroe, Judy Garland, and John Belushi.
Most childhood vaccines are 90–99% effective in preventing disease. Side effects are rarely serious.