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  1. ...quot;. They can locomote using the foot when conditions are suitable, or they can "clamp down" against... to remain safely attached despite the dangerous wave action on exposed rocky shores. ...

    分類:科學及數學 > 生物學 2007年08月24日

  2. ...compensate, oxygen saturation in arterial blood can drop to 95% or less under these conditions .[5] Oxygen saturation this low is considered dangerous in an individual at rest (for instance, during surgery under anesthesia): &quot...

    分類:科學及數學 > 生物學 2007年01月30日

  3. ...unqualified surgeons often working in unsafe conditions . Result: serious medical problems. ... end up with infections caused by dangerous implants, according to Nguyen...

    分類:科學及數學 > 生物學 2007年01月18日

  4. ... behave differently in an aquarium. They become conditioned to being here, with many born at Ocean... true or not Sharks are not necessarily dangerous , unless they are provoked. Some...

    分類:科學及數學 > 生物學 2006年12月08日