• 2022-06-09 问题

    Which of the following countries has the highest Human Development Index: A: United States of America B: Congo C: India D: Norway E: Equatorial Guinea F: Japan

    Which of the following countries has the highest Human Development Index: A: United States of America B: Congo C: India D: Norway E: Equatorial Guinea F: Japan

  • 2022-05-31 问题

    Eratosthenes calculated the earth's circumference, giving it a circumference of about____miles, compared with the current equatorial circumference of about 24 902 miles. A: 18000 B: 25000 C: 20000 D: 27000

    Eratosthenes calculated the earth's circumference, giving it a circumference of about____miles, compared with the current equatorial circumference of about 24 902 miles. A: 18000 B: 25000 C: 20000 D: 27000

  • 2022-06-09 问题

    Which of the following has two equatorial alkyl substituents in its most stable conformation? () A: 1,1-dimethylcyclohexane B: cis-1,2-dimethylcyclohexane C: cis-1,3-diethylcyclohexane D: cis-1,4-diethylcyclohexane E: trans-1,3-diethylcyclohexane

    Which of the following has two equatorial alkyl substituents in its most stable conformation? () A: 1,1-dimethylcyclohexane B: cis-1,2-dimethylcyclohexane C: cis-1,3-diethylcyclohexane D: cis-1,4-diethylcyclohexane E: trans-1,3-diethylcyclohexane

  • 2022-05-31 问题

    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

    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

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