判断题Register is a term widely used in sociolinguistics to refer to varieties according to use.()
判断题In the phrases a herd of cattle, a flock of sheep, both cattle and sheep contain two morphemes.()
判断题Certain kinds of wind can do harm to human health.()
判断题Spam blockers are a kind of virus which prevents your email box from receiving any emails.()
判断题Organic food is common in mountainous regions.()
