房地产开发企业四级资质持有资格证书的专职会计人员不少于( )人。
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The babies Would "smile and bubble" at the lights because ______.
A. they succeeded in "switching on" the light
B. the sight of the lights was interesting
C. they need not turn back to watch the lights
D. the lights were directly related to some basic "drives”
Bill put the target there ______.
A. a month ago
B. less than a month ago
C. more than a month ago
D. several days ago
物业管理活动的基础是( )。
A. 物业管理合同
B. 物业服务合同
C. 物业合作合同
D. 物业管理协议
Which of the following statements is NOT true according to the passage ______.
A. accuracy in speed measurement is essential to spaceships
B. the speeds of space vehicles will vary greatly
C. inaccuracies in measurement could cause accidents in space missions
D. a bump could affect the preciseness of the laser-dopple radar
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