The satellites of GPS orbit on six orbital planes spaced at ( ) intervals around the equator.
A: 120°
B: 90°
C: 30°
D: 60°
A: 120°
B: 90°
C: 30°
D: 60°
D
举一反三
- The space segment of GPS consists nominally of 24 satellites operating in six orbital planes spaced at 60° intervals around the equator. ( )
- 梯形螺纹的牙型角为 ( )。 A: 29 ° B: 30 ° C: 33 ° D: 40 °
- Which of the following statements about the constellation of GLONASS is correct? ( ) A: There are 24 satellites equally spaced in three orbital planes B: GLONASS is suited for the usage in high latitudes C: GLONASS uses a nominal altitude of 19,100 km D: GLONASS uses 64.8°nominal inclination angle with the equatorial plane of the Earth
- 设f,g是R上的多项式,那么deg(f+g)=max{deg(f),deg(g)}。()
- 当四杆机构处于死点位置时,机构的压力角为( )。 A: 180 ° B: 90° C: 与构件有关 D: 0 °
内容
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【单选题】设f(x),g(x)∈F[x],则()。 A. deg(f(x)g(x)) B. deg(f(x)+g(x))>degf(x)+degg(x)) C. deg(f(x)g(x))=degf(x)+degg(x) D. deg(f(x)g(x))=deg(f(x)+g(x))
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如果两个单项式f,g满足deg(f)>deg(g),那么在字典序下f>g。()
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电阻性负载三相半波可控整流电路中,控制角的范围是( ) A: 15°~125° B: 0°~150° C: 0°~120° D: 30°~150 °
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transform:rotate3d(0,1,0,45deg)”的涵义是?
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【单选题】设f(x),g(x)∈F[x],若f(x)=0则有()。 A. deg(f(x)g(x))>max{degf(x),degg(x)} B. deg(f(x)+g(x))=max{degf(x),degg(x)} C. deg(f(x)+g(x))>max{degf(x),degg(x)} D. deg(f(x)g(x))