Many population studies have linked a high-salt diet to high rates of hypertension and shown that in societies where they consume little salt, their blood pressure typically does not rise with age.
shown that in societies where they consume little salt, their
shown that in societies that have consumed little salt, their
shown that in societies where little salt is consumed,
they showed that in societies where little salt is consumed,
they showed that in societies where they consume little salt, their
正确答案是C,但是shown that in societies where little salt is consumed, blood pressure typically does not rise with age.
这两个句子间没有连词啊
为什么是正确的
in societies where little salt is consumed是介词短语啊,where little salt is consumed是定语从句,修饰societies的。
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