导游语言的艺术性和趣味性的具体体现是导游语言的( )。
A．清楚 B．正确 C．生动 D．灵活
参考答案：C
8岁男孩，因呕吐伴手足搐搦2日住院。患者曾发生呕吐三次。住院时疲乏无力，尿少，口渴。测：血浆钠130mmol／L
患者手足搐搦的原因为（）
A.缺Na
B.缺Ca
C.缺Mg
D.缺K
E.缺Cr
An investor purchased a 10 - year zero-coupon bond with a yield to maturity of 10 percent and a par value of $1000. What would her rate of return be at the end of the year if she sells the bond Assume the yield to maturity on the bond is 9 percent at the time it is sold and annual compounding periods are used.（）
A. 16.00%.
B. 17.63%.
C. 19.42%.
