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Insectivorous: a generalized type found in many passerines, ranging from
relatively straight and pointed (as in the wood warblers, Parulidae), through bills
with a slight or pronounced hook (some New World flycatchers), to those that are
Food, although essential, is relatively easy to produce; aircraft, at the high end of
the scale, perform a desirable function but do so with complex and expensive
mechanisms that command much higher unit prices which reflect not only the ...
Because of the relatively weak intermolecular attractions (van der Waals forces)
between the separate P4 molecules, the solid melts easily at 44. 1 ° C and boils
at about 280° C. Formation of tetrahedra requires bond angles of 60° instead of ...
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The New Encyclopaedia Britannica (Encyclopaedia)User Review - Not Available - Book Verdict
For virtually all its 238 years,Britannica has ruled the shelves as a peerless general encyclopedia. Reviewers have consistently given it high marks for most of the 12 criteria identified inKister's ... Read full review