知识的问题是一个科学问题，来不得半点虚伪和骄傲，需要的倒是其反面——诚实和谦逊的态度。
参考答案：对
Flu is a very ______ infectious disease. Fever, headaches, coughing and fatigue are some of its ______ symptoms.
A．normal; common
B．usual; ordinary
C．common; usual
D．ordinary; normal
什么是真常唯心的思想？
