冬期施工时,水泥混凝土拌合物的加热温度不应超过()。
A. 20℃
B. 35℃
C. 40℃
D. 60℃
水泥混凝土路面的主要检查项目有抗压强度、抗折强度和()。
A. 平整度
B. 厚度
C. 宽度
D. 中线高程
Which statement of Galileo is true according to the text?
A. In 1659, he invented the astronomical telescope.
B. He firstly found Saturn on July 25, 1610.
C. He made an accurate description of the Saturn.
D. His early discoveries didn’t include Venus.
Which statement is correct based on the text?
A. Christiaan Huygens was the first to define Saturn as a ringed planet.
B. NASA’s Cassini collects data of Saturn on a monthly basis.
C. Seen from the Saturn, planet Earth is a quite huge dot in the sky.
D. People cannot see Saturn in the sky without the help of a telescope.
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