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【单选题】
导游语言不仅包括口头语言，还包括态势语言、书面话言和（  ）。
A.
肢体语言
B.
副语言
C.
表情语言
D.
目光语言
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【单选题】There are eight analog signals, each of bandwidth B=2kHz. Samples of these signals are time-division-multiplexed, quantized and binary-coded. The step size Δ of the quantizer cannot be greater than 0....
A.
L=400, BT=288 (kHz)
B.
L=400, BT=576 (kHz)
C.
L=200, BT=576 (kHz)
D.
L=200, BT=288 (kHz)
查看完整题目与答案
【单选题】There are eight analog signals, each of bandwidth B=4kHz. Samples of these signals are time-division-multiplexed, quantized and binary-coded. The step size Δ of the quantizer cannot be greater than 0....
A.
L=2000, BT=110;
B.
L=2000, BT=220;
C.
L=1000, BT=110;
D.
L=1000, BT=55;
查看完整题目与答案
【单选题】Consider a two-country two-good model where labor is the only factor of production . Each country faces an increasing-cost production-possibility curve. In th is model the amount s of both goods that ...
A.
B.
C.
D.
D
查看完整题目与答案
【简答题】A 440-V 50-Hz two-pole Y-connected induction motor is rated at 85 kW. The equivalent circuit parameters are R 1 = 0.105 Ω R 2 = 0.065 Ω X m = 7.9 Ω X 1 = 0.17 Ω X 2 = 0.17 Ω P F&W = 1.6 k...
查看完整题目与答案
【简答题】Assume that both portfolios A and B are well diversified, that E ( r A ) =12%, and E ( r B ) =9%. If the economy has only one factor, and β(A) =1.2, whereas β(B)=0.8, what must be the risk-free rate?
查看完整题目与答案
【单选题】安静时 K + 由细胞内向细胞外的移动属于 ( )
A.
出胞作用
B.
主动转运
C.
单纯扩散
D.
经载体扩散
E.
经通道扩散
查看完整题目与答案
【单选题】For a transmission line supplying a load with a lagging power factor, the sending and receiving end voltages are V_S=11.8 kV and: V_R=11.0 kV. What is the voltage regulation, stated as a percentage?
A.
-6.8%
B.
-7.3%
C.
6.8%
D.
+7.3%
查看完整题目与答案
【多选题】关于生产函数Q=ƒ(L, )的生产的第二阶段应该是( )。
A.
开始于AP L 开始递减处,终止于MP L 为零处
B.
开始于MP L 开始递减处,终止于AP L 为零处
C.
开始于AP L 曲线和MP L 曲线相交处,终止于MP L 曲线和水平轴的相交处
D.
开始于AP L 的最高点,终止于TP L 的最高点
查看完整题目与答案
【简答题】A 60-Hz 20-kVA 8000/240-Vrms transformer has the following equivalent-circuit parameters: Primary resistance R 1 = 15Ω Secondary resistance R 2 = 0.02Ω Primary leakage reactance X 1 = 120Ω Secondary l...
查看完整题目与答案
【单选题】关于生产函数Q=ƒ(L. )的生产的第二阶段应该是( )。
A.
开始于AP L 开始递减处,终止于MP L 为零处;
B.
开始于MP L 开始递减处,终止于AP L 为零处;
C.
开始于AP L 曲线和MP L 曲线相交处,终止于MP L 曲线和水平轴的相交处;
D.
开始于AP L 的最高点,终止于TP L 的最高点。
查看完整题目与答案
相关题目：
【单选题】There are eight analog signals, each of bandwidth B=2kHz. Samples of these signals are time-division-multiplexed, quantized and binary-coded. The step size Δ of the quantizer cannot be greater than 0....
A.
L=400, BT=288 (kHz)
B.
L=400, BT=576 (kHz)
C.
L=200, BT=576 (kHz)
D.
L=200, BT=288 (kHz)
查看完整题目与答案
【单选题】There are eight analog signals, each of bandwidth B=4kHz. Samples of these signals are time-division-multiplexed, quantized and binary-coded. The step size Δ of the quantizer cannot be greater than 0....
A.
L=2000, BT=110;
B.
L=2000, BT=220;
C.
L=1000, BT=110;
D.
L=1000, BT=55;
查看完整题目与答案
【单选题】Consider a two-country two-good model where labor is the only factor of production . Each country faces an increasing-cost production-possibility curve. In th is model the amount s of both goods that ...
A.
B.
C.
D.
D
查看完整题目与答案
【简答题】A 440-V 50-Hz two-pole Y-connected induction motor is rated at 85 kW. The equivalent circuit parameters are R 1 = 0.105 Ω R 2 = 0.065 Ω X m = 7.9 Ω X 1 = 0.17 Ω X 2 = 0.17 Ω P F&W = 1.6 k...
查看完整题目与答案
【简答题】Assume that both portfolios A and B are well diversified, that E ( r A ) =12%, and E ( r B ) =9%. If the economy has only one factor, and β(A) =1.2, whereas β(B)=0.8, what must be the risk-free rate?
查看完整题目与答案
【单选题】安静时 K + 由细胞内向细胞外的移动属于 ( )
A.
出胞作用
B.
主动转运
C.
单纯扩散
D.
经载体扩散
E.
经通道扩散
查看完整题目与答案
【单选题】For a transmission line supplying a load with a lagging power factor, the sending and receiving end voltages are V_S=11.8 kV and: V_R=11.0 kV. What is the voltage regulation, stated as a percentage?
A.
-6.8%
B.
-7.3%
C.
6.8%
D.
+7.3%
查看完整题目与答案
【多选题】关于生产函数Q=ƒ(L, )的生产的第二阶段应该是( )。
A.
开始于AP L 开始递减处,终止于MP L 为零处
B.
开始于MP L 开始递减处,终止于AP L 为零处
C.
开始于AP L 曲线和MP L 曲线相交处,终止于MP L 曲线和水平轴的相交处
D.
开始于AP L 的最高点,终止于TP L 的最高点
查看完整题目与答案
【简答题】A 60-Hz 20-kVA 8000/240-Vrms transformer has the following equivalent-circuit parameters: Primary resistance R 1 = 15Ω Secondary resistance R 2 = 0.02Ω Primary leakage reactance X 1 = 120Ω Secondary l...
查看完整题目与答案
【单选题】关于生产函数Q=ƒ(L. )的生产的第二阶段应该是( )。
A.
开始于AP L 开始递减处,终止于MP L 为零处;
B.
开始于MP L 开始递减处,终止于AP L 为零处;
C.
开始于AP L 曲线和MP L 曲线相交处,终止于MP L 曲线和水平轴的相交处;
D.
开始于AP L 的最高点,终止于TP L 的最高点。
查看完整题目与答案