喘证是（）
A．重要病机之一
B．多次、多食、多尿、消瘦、乏力
C．肺、胃、肾
D．清热润燥，养阴生津
E．阴津亏损，燥热偏盛
参考答案：D
填入适当的单词补全句子。
1. My mother goes to work _____________ bus.
2. John usually _____________ football with his friends.
3. We _____________ mountains last Sunday morning.
4. _____________ he go fishing with you yesterday?
5. Last Monday, I _____________ to the library.
下列关于耐高温新型陶瓷材料氮化硅（Si3N4）的叙述正确的是
A．氮化硅中氮元素的质量分数为40%
B．氮化硅是有机高分子合成材料
C．氮化硅中硅与氮的质量比为3: 4
D．氮化硅的相对分子质量是140g
