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[填空题]Scientists have a clear explanation for the existence of music.
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Scientists in India have discovered a way to make bamboo
plants produce flowers in laboratory. The British{{U}} (36) {{/U}}Nature
recently reported the{{U}} (37) {{/U}}event. In the wild it can take as
long as one hundred and twenty years for some kinds of bamboo to flower, and
after the plant{{U}} (38) {{/U}}its seeds it dies. The bamboo plant is
used in many different ways. But because it takes so long to produce seeds,
scientists never{{U}} (39) {{/U}}it a traditional farm crop. The
recent{{U}} (40) {{/U}}in India may change that. The{{U}} (41)
{{/U}}was done at the National Chemical Laboratory in India. Three
scientists cut two hundred pieces from two different kinds of bamboo plants;
each was a few{{U}} (42) {{/U}}long. The tiny cuttings were placed in
the{{U}} (43) {{/U}}of coconuts milk, plant-growth hormone and other
nutrients. Just a few weeks later, flowers began to appear. {{U}} (44)
{{/U}}. Two weeks after that th
