搜题请搜索小程序“爱下问搜题”
问题 选择题
在△ABC中，角A，B，C对应边分别是a，b，c，a=5，b=8，C=60°，则
BC
•
CA
+|
AB
-
AC
|等于（　　）
A．-15B．25C．20
3
+5		D．-20
3
+5
答案

BC
•
CA
+|
AB
-
AC
|

=

|BC|
•|
CA
|cos(π-C)+|
CB
|

=a•b•（-

1
2
）+a

=5×8×（-

1
2
）+5

=15

故选：A

单项选择题 A1/A2型题

属于肾癌患者肾外表现的是（）

A.低血压占肾癌患者的20%～40%

B.持续或间歇出现高热

C.大约半数以上的患者红细胞沉降率较正常人慢

D.1／3～1／2的患者有贫血

E.若肾静脉有癌栓，患侧阴囊可见精索静脉曲张，平卧位可消失
查看答案
单项选择题

Consider a $10000000 1-year quarterly-pay swap with a fixed rate of 4.5 percent and a floating rate of 90-day London Interbank Offered Rate (LIBOR) plus 150 basis points. 90-day LIBOR is currently 3 percent and the current forward rates for the next four quarters are 3.2 percent, 3.6 percent, 3.8 percent, and 4 percent. If these rates are actually realized, at the second quarterly settlement date, the fixed-rate payer in the swap will:

A．

A. receive a payment of $10000.

B．

B. receive a payment of $ 5000.

C．

C. be required to pay $117500.
查看答案