单项选择题

The two newest states which joined the United States are ______.

A．Alaska and Kentucky.
B．Hawaii and Arizona.
C．Alaska and Hawaii.
D．Vermont and New Mexico.
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单项选择题
Which of the following statements is NOT true of the cosmos
A．Microwaves are the medium WMAP used to make measurements.
B．Warmer spots would finally develop into the clusters of galaxies.
C．Dark energy is a decisive factor in the cosmic expansion.
D．The nature of dark matter in space is unknown to scientists.
单项选择题
What can we infer from Bahcall's comment
A．WMAP's findings are quite convincing and he accepted them.
B．WMAP will solve all the problems that have puzzled cosmologists.
C．WMAP's findings accord with Einstein's concept of space-time.
D．We may ignore some strange measurements in WMAP's data.
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