Two major problems for museums are that they have too many visitors and they__________
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根据下列文字,回答 27~30 题。
第 27 题 Intelligence was once believed to be a fixed entity, valued as _______.
Tickets are limited and will be allocated to those who apply first.
Finnish vowels are easy to distinguish.
One survey showed that people who habitually________ each night have a higher risk of dying.