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【简答题】
已知圆C 1 的圆心在坐标原点O,且恰好与直线l 1 : 相切. (Ⅰ)的标准方程; (Ⅱ)设点A(x 0 ,y 0 )为圆上任意一点,AN⊥x轴于N,若动点Q满足 ,(其中m+n=1,m,n≠0,m为常数),试求动点Q的轨迹方程C 2 ; (Ⅲ)在(Ⅱ)的结论下,当 时,得到曲线C,问是否存在与l 1 垂直的一条直线l与曲线C交于B、D两点,且∠BOD为钝角,请说明理由.
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【单选题】资金时间价值与利率之间的关系是
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交叉关系
B.
被包含与包含关系
C.
主次关系
D.
没有任何关系
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A.
抗甲状腺药物
B.
经抗甲状腺药物治疗,控制甲亢后手术
C.
131Ⅰ
D.
普萘洛尔
E.
服用消瘿汤
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A.
Alt
B.
Ctrl
C.
Shift
D.
Del
【单选题】PRK 2.7 Which of the following socio-cultural trends will have a direct impact on most business organisations? (i) Increasing ethnic and religious diversity in populations (ii) Falling birthrates (iii...
A.
(iii) only
B.
(i) and (iii) only
C.
(i), (ii) and (iii) only
D.
(i), (ii), (iii) and (iv)
【单选题】一种样品若没有标明是参考样品还是标准样品,应看作为()
A.
参考样品
B.
标准样品
C.
双方协商
D.
参考国际标准
【单选题】一种样品若没有标明是参考样品还是标准样品,应看做为______。
A.
参考样品
B.
标准样品
C.
双方协商
【单选题】Which of the following organisations is most likely to benefit from a period of high price inflation?
A.
An exporter of goods to a country with relatively low inflation
B.
An organisation which has a large number of long-term payables
C.
A supplier of goods in a market where consumers are highly price sensitive and substitute imported goods are available
D.
A large retailer with a high level of inventory on display and low rate of inventory turnover
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【单选题】Which of the following socio-cultural trends will have a direct impact on most business organisations?(i)Increasing ethnic and religious diversity in populations(ii)Falling birthrates(iii)Focus on 'gr...
A.
(iii) only
B.
(i) and  (iii) only
C.
(i),  (ii) and  (iii) only
D.
(i),  (ii),  (iii) and  (iv)
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A.
A private accountancy college
B.
A local authority
C.
A small retailer
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