A passenger vesse1 is underway. When may passengers visit the pilot house? ___ A: Passengers are excluded from the pi1othouse while underway. B: Passengers are permitted in the pi1othouse during daylight hours only. C: Passengers are permitted to visit the pi1othouse when authorized by the master and officer of the watch. D: Passengers are permitted in the pi1othouse when they are escorted by a ship's officer.
A passenger vesse1 is underway. When may passengers visit the pilot house? ___ A: Passengers are excluded from the pi1othouse while underway. B: Passengers are permitted in the pi1othouse during daylight hours only. C: Passengers are permitted to visit the pi1othouse when authorized by the master and officer of the watch. D: Passengers are permitted in the pi1othouse when they are escorted by a ship's officer.
求定积分[img=165x50]17da65381a63c9b.png[/img]; ( ) A: (exp(6*pi) - 1)/(5*exp(2*pi)) B: (exp(6*pi) - 1)*(5*exp(2*pi)) C: (exp(6*pi) - 1)/(exp(2*pi)) D: (exp(6*pi) - 1)+(5*exp(2*pi))
求定积分[img=165x50]17da65381a63c9b.png[/img]; ( ) A: (exp(6*pi) - 1)/(5*exp(2*pi)) B: (exp(6*pi) - 1)*(5*exp(2*pi)) C: (exp(6*pi) - 1)/(exp(2*pi)) D: (exp(6*pi) - 1)+(5*exp(2*pi))
求定积分[img=208x53]17da65384e03d75.png[/img]; ( ) A: pi/4 - 1/4 B: pi/4 - 1/3 C: pi/4 - 1 D: pi/4 - 1/2
求定积分[img=208x53]17da65384e03d75.png[/img]; ( ) A: pi/4 - 1/4 B: pi/4 - 1/3 C: pi/4 - 1 D: pi/4 - 1/2
函数\(f(x) = x^2,\; x \in [-\pi,\pi]\)的Fourier级数为 A: \(\frac{\pi^2}{3}+4\Sigma_{n=1}^{\infty} \frac{(-1)^n}{n^2} \sin nx ,\; x \in [-\pi,\pi]\) B: \(\frac{\pi^2}{3}+4\Sigma_{n=1}^{\infty} \frac{(-1)^n}{n^2} \cos nx ,\; x \in [-\pi,\pi]\) C: \(\frac{2\pi^2}{3}+4\Sigma_{n=1}^{\infty} \frac{(-1)^n}{n^2} \sin nx ,\; x \in [-\pi,\pi]\) D: \(\frac{2\pi^2}{3}+4\Sigma_{n=1}^{\infty} \frac{(-1)^n}{n^2} \cos nx ,\; x \in [-\pi,\pi]\)
函数\(f(x) = x^2,\; x \in [-\pi,\pi]\)的Fourier级数为 A: \(\frac{\pi^2}{3}+4\Sigma_{n=1}^{\infty} \frac{(-1)^n}{n^2} \sin nx ,\; x \in [-\pi,\pi]\) B: \(\frac{\pi^2}{3}+4\Sigma_{n=1}^{\infty} \frac{(-1)^n}{n^2} \cos nx ,\; x \in [-\pi,\pi]\) C: \(\frac{2\pi^2}{3}+4\Sigma_{n=1}^{\infty} \frac{(-1)^n}{n^2} \sin nx ,\; x \in [-\pi,\pi]\) D: \(\frac{2\pi^2}{3}+4\Sigma_{n=1}^{\infty} \frac{(-1)^n}{n^2} \cos nx ,\; x \in [-\pi,\pi]\)
下列关于净现值NPV和获利指数PI的说法,正确的是( )。 A: NPV=0,PI=1 B: NPV>0,PI<1 C: NPV>1,PI>0 D: NPV<0,PI>1
下列关于净现值NPV和获利指数PI的说法,正确的是( )。 A: NPV=0,PI=1 B: NPV>0,PI<1 C: NPV>1,PI>0 D: NPV<0,PI>1
计算\({\oint_L {({x^2} + {y^2})} ^n}ds\),其中\(L\)为圆周\(x = a\cos t\),\(y=asint\)\((0 \le t \le 2\pi )\)。 A: \(2\pi {a^{n + 1}}\) B: \(2\pi {a^{2n + 1}}\) C: \(\pi {a^{n + 1}}\) D: \(2\pi {a^{n + 1}}\)
计算\({\oint_L {({x^2} + {y^2})} ^n}ds\),其中\(L\)为圆周\(x = a\cos t\),\(y=asint\)\((0 \le t \le 2\pi )\)。 A: \(2\pi {a^{n + 1}}\) B: \(2\pi {a^{2n + 1}}\) C: \(\pi {a^{n + 1}}\) D: \(2\pi {a^{n + 1}}\)
pi做为离散分布应满足的条件为() A: pi≥0 B: p1+p2+…+pn=1 C: pi≤0 D: pi≥0且p1+p2+…+pn=1
pi做为离散分布应满足的条件为() A: pi≥0 B: p1+p2+…+pn=1 C: pi≤0 D: pi≥0且p1+p2+…+pn=1
积分$\int_0^1 x \arctan xdx=$()。 A: $\frac{\pi}{4}+\frac{1}{2}$ B: $\frac{\pi}{4}$ C: $\frac{\pi}{4}-\frac{1}{2}$ D: $\frac{1}{2}$
积分$\int_0^1 x \arctan xdx=$()。 A: $\frac{\pi}{4}+\frac{1}{2}$ B: $\frac{\pi}{4}$ C: $\frac{\pi}{4}-\frac{1}{2}$ D: $\frac{1}{2}$
下列关于NPV与PI关系表述正确的是( ) A: 若NPV=0,则PI=1 B: 若NPV>0,则PI<1 C: 若NPV<0,则PI>1 D: 若NPV<0,则PI不确定
下列关于NPV与PI关系表述正确的是( ) A: 若NPV=0,则PI=1 B: 若NPV>0,则PI<1 C: 若NPV<0,则PI>1 D: 若NPV<0,则PI不确定
9. 关于PI决策下述说法不正确的是( ) A: A. PI>1意味着项目NPV>0 B: B. PI>1意味着项目ROA>0 C: C. PI>1意味着投资回收期一定小于项目周期 D: D. PI>1意味着项目IRR>0
9. 关于PI决策下述说法不正确的是( ) A: A. PI>1意味着项目NPV>0 B: B. PI>1意味着项目ROA>0 C: C. PI>1意味着投资回收期一定小于项目周期 D: D. PI>1意味着项目IRR>0