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Annotation of 42BSD/usr.lib/learn/morefiles/L6.1e, revision 1.1.1.1

1.1       root        1: #print
                      2: By the way, you can also use "grep" to print out ___all ___but
                      3: those lines that contain occurrences of a pattern:
                      4:   grep -v pat files...
                      5: prints all the lines in files... that don't contain
                      6: any "pat".
                      7: How many of the lines in "bio*" don't contain "the"?
                      8: Type "answer N", where N is the number of lines.
                      9: #create bio1
                     10:    Roughly speaking, your eye is made of three balls, or layers,
                     11: fitted tightly one inside the other.  the tough white outermost
                     12: layer's function is to protect the others.  the middle layer gives
                     13: the front of your eye its brown, gray, or blue color.  The inside
                     14: of this layer is dark and full of tiny blood vessels.  The innermost
                     15: layer, called the retina, is made of very special nerve cells that
                     16: are sensitive to light and color.  A nerve cord connects the retina
                     17: of each eye to your brain.
                     18:    The front of your eye's two outer layers (the cornea) is clear,
                     19: or open, to let light enter.
                     20: #create bio2
                     21:    We do not know when life began on the earth, and it seems likely
                     22: that the answer to this question will remain forever hidden from us.
                     23: What we do know is that it was some 500 million years ago when the
                     24: plants and animals of early geologic history had reached a stage of
                     25: development where they produced hard parts capable of being preserved
                     26: as fossils.
                     27:    At this distant date there seemingly was no land life; all life
                     28: was in the sea.  Moreover, there were no vertebrates, or backboned
                     29: animals, living -- at least none of sufficient complexity that they
                     30: left hard structures to be preserved in the form of fossils.
                     31: #copyin
                     32: #user
                     33: #uncopyin
                     34: #match 6
                     35: #log
                     36: #next
                     37: 7.1a 10
                     38: 6.2e 5

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