【单选题】We are receipt your letter of August 1 offering us the captioned goods USD 1,000 per long ton.
【单选题】We are receipt your letter of March 18 offering us the goods US$80 per dozen on the usual terms.
【简答题】We are in receipt of your letter of March 20, 要求在本月底答复。
【判断题】气道高反应性与不可逆性气流受限,是支气管哮喘的两个基本特征。