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【单选题】
套利定价理论中,一个充分分散风险的资产组合,组成证券数目越多,非系统风险就越接近_________。A.
0
B.
1
C.
无穷大
D.
-1
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【简答题】男性,70岁,1年前无明显诱因出现右下腹痛,经B超检查发现右下腹一鸡蛋大小包块,疑为阑尾周围脓肿,经抗感染治疗后腹痛消失。此后间歇出现腹部胀痛,右下腹部包块逐渐增大;钡剂灌肠示盲肠占位性病变。1个月前出现腹膨隆,腹胀,进食后加重,排气减少。发病以来消瘦,体重下降l0kg。门诊以“结肠肿瘤”收入院。 (1)为明确诊断,还需进行哪项检查? (2)若需手术如何进行肠道准备? (3)若病人术后行留置导尿,...
【单选题】听力原文：W: Mike, I'm sorry, but I have to call to tell you... M: What? W: The truth is... Your job is not so well done. M: Are you certain I didn't perform. well in the office? W: Tom, you've received re...
A.
Husband and wife.
B.
Boss and employee.
C.
Receptionist and customer.
D.
Waiter and guest.
【单选题】. 40 A:Red Sea,this is Pilot Station. What is your last port of call? Over. B:Pilot Station,this is Red Sea. My last port of call was Shanghai. Over. Q:What can you learn from the conversation? ...
A.
The vessel- s destination is Shanghai .
B.
The vessel sails for Shanghai
C.
The vessel is in Shanghai
D.
The vessel's last port of call was Shanghai
【简答题】A．He can't call a taxi for her. B．There is no taxi. C．The traffic is heavy. D．The line is busy.
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