低附息债券比高附息债券的内在价值要高。( )
参考答案：对
解析： 略
影响连续监测法测定酶活性浓度的干扰因素主要有_______、__________、__________、____________和__________等。
A lot of ads are aimed speciall _____ teenagers. [ ]
A. at
B. with
C. by
D. in
