联轴器找中心时,每次用塞尺塞入的深度、方向、位置及松紧程度应相同,塞尺片不应过多,塞尺片数以()片为宜,且塞尺片不应有折纹。
A.≤3
B.≤4
C.≤5
D.≤6
参考答案:B
An analyst collects the following spot rates, stated as annual BEYs: 6-month spot rate =6%. 12-month spot rate =6.5%. 18-month spot rate =7%. 24-month spot rate =7.5%. Given only this information, the value of a 2 -year, semiannual-pay, 10% coupon bond with a face value of $1000 is closest to:()
A. $918.30.
B. $1000.00.
C. $1046.77.
物种多样性监测的主要途径有()。
A、样带法
B、无线电跟踪法
C、标记-重新俘获法
D、固定样地法
E、现场制图