问题描述：
帮我分析下句子 主干 成分
1 The problem now is that water levels in all rivers and lakes have fallen dangerously low and ,in some cases are well below the intake pipes which feed into the pipelines which supply the cooling towers.
2 Numerous other commercial enterprises,from theaters to magazine publishers,from gas and electric utilities to milk processors,bring better and more efficient services to consumers through the use of computers.
1 The problem now is that water levels in all rivers and lakes have fallen dangerously low and ,in some cases are well below the intake pipes which feed into the pipelines which supply the cooling towers.
2 Numerous other commercial enterprises,from theaters to magazine publishers,from gas and electric utilities to milk processors,bring better and more efficient services to consumers through the use of computers.
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