由1000个脱氧核苷酸对组成的DNA片段可能的排列方式有 [ ]
A．10004种
B．41000种
C．10003种
D．42000种
答案：B
伊斯兰教最神圣的城市和圣地指（）。
A.耶路撒冷
B.麦加
C.麦地那
D.西奈山
An investor has a 1-year, semiannual, 10% coupon bond which is priced at $1025. If the 6-month spot rate on a bond-equivalent basis is 8%, the 1-year theoretical spot rate as a BEY is:（）
A. 6.4%.
B. 7.3%.
C. 8.0%.
