单项选择题

The word "intriguing" in paragraph 3 refers to ______.

A．tractable
B．dauntless
C．heroic
D．appealing
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单项选择题
It isn't said in the passage that L-GG can be used to ______.
A．lessen symptoms of Crohn's disease
B．fight against rotavirus
C．treat traveler' s diarrhea
D．treat intestinal upsets caused by antibiotics
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