问题
单项选择题 案例分析题
某一防冻剂进行检测，所测数据列于下表，计算这一防冻剂的性能指标并回答下述问题。（混凝土一次拌和30L，混凝土容重为2400kg/m3，负温温度为-10℃）
则掺该防冻剂混凝土的28d抗压强度比R28为（）。
A.121%
B.120%
C.119%
D.118%
答案
参考答案：A
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某一防冻剂进行检测，所测数据列于下表，计算这一防冻剂的性能指标并回答下述问题。（混凝土一次拌和30L，混凝土容重为2400kg/m3，负温温度为-10℃）
则掺该防冻剂混凝土的28d抗压强度比R28为（）。
A.121%
B.120%
C.119%
D.118%
参考答案：A
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| Two friends were walking 1 the desert. During the journey they 2 . And the taller boy slapped the shorter 3 in the face. The shorter boy was hurt. But 4 , he wrote in the sand, "Today my best friend slapped me 5 the face." They 6 till they found a pond. And they decided to take a bath there. The shorter boy 7 in the mud and started to sink. He 8 , "Help! Help!" Luckily, he was pulled to 9 by his friend. After that, he carved on a stone, "Today my best friend 10 ." The taller boy asked him, "After I hurt you, you 11 in the sand, but now you carve on the stone. Why?" The shorter boy replied, "When someone 12 you, you should write it in the sand 13 the wind can erase (清除) it easily. However, when someone 14 for you, you should carve it on a stone from which the wind can 15 erase it." | ||||
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