患者，男，38岁。牙痛红肿，烦渴多饮，舌红苔黄，脉洪数。用药应首选的药物是（）
A.栀子
B.黄芩
C.黄连
D.黄柏
E.龙胆草
参考答案：C
—What did your son say in the letter?
—He told me that he __________ the Great Wall the next day.
A．will visit
B．has visited
C．is going to visit
D．would visit
植物新品种权的保护期限的起算日期是（）.
A.申请日
B.公告日
C.授权日
D.植物培育完成日
