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Author Question: Mandarin Chinese has all of the following contrasting tones except: a. flat b. rising c. falling ... (Read 77 times) |
Barbituric acid, the base material of barbiturates, was first synthesized in 1863 by Adolph von Bayer. His company later went on to synthesize aspirin for the first time, and Bayer aspirin is still a popular brand today.
There used to be a metric calendar, as well as metric clocks. The metric calendar, or "French Republican Calendar" divided the year into 12 months, but each month was divided into three 10-day weeks. Each day had 10 decimal hours. Each hour had 100 decimal minutes. Due to lack of popularity, the metric clocks and calendars were ended in 1795, three years after they had been first marketed.
Since 1988, the CDC has reported a 99% reduction in bacterial meningitis caused by Haemophilus influenzae, due to the introduction of the vaccine against it.
By definition, when a medication is administered intravenously, its bioavailability is 100%.
The U.S. Preventive Services Task Force recommends that all women age 65 years of age or older should be screened with bone densitometry.