下列血清酶在急性心肌梗死时,最早升高的是
A.天门冬氨酸氨基转移酶B.丙氨酸氨基转移酶C.乳酸脱氢酶D.肌酸激酶E.碱性磷酸酶
参考答案:D
About six months later,the letter they were looking forward to ________at last.
A.arrived
B.arriving
C.had arrived
D.arrive
利率期限结构的形成主要是由对未来利率变化方向的预期决定的,流动性溢价和市场分割可起一定作用。( )