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问题 单项选择题

某企业一辆运输卡车原值为96000元，预计总行驶里程为20万公里，净残值为6000元。本月企业该卡车行驶5000公里，不考虑其他因素，依据工作量法该卡车本月应计提的折旧额为（）元。

A.2400

B.0.45

C.2250

D.0.48

答案

参考答案：C

填空题
已知非负实数x，y满足
1
x
+
4
y
=1，则非负实数x+y满足的最大值为______．
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单项选择题

An analyst does research about the portfolio's standard deviation of return. A portfolio consisting of two securities has the following characteristics:

Security Portfolio Weight Standard Deviation
1 35% 16%
2 65% 19%
If the correlation of returns between the two securities is -0.25, the portfolio's standard deviation of return is closest to:（）

A. 12.22%

B. 14.78%

C. 14.93%
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