During a single hour, an automatic camera photographed 100 vehicles that were speeding on a one-way road, and police a mile farther down the road photographed 49 vehicles that were speeding. Since every vehicle that passed the automatic camera also passed the police during the hour, the police photographed fewer than half of the vehicles that were speeding when passing them. Which of the following is an assumption on which the reasoning in the argument above depends
A. Fewer than half of the vehicles that were speeding when they passed the police were already speeding when they passed the automatic camera.
B. Drivers who are not exceeding the speed limit are less likely than drivers who are speeding to reduce their driving speed when they see a marked police car.
C. Most of the vehicles that were speeding when they passed the automatic camera were still speeding when they passed the police.
D. More than 100 vehicles passed the automatic camera during the hour in which the automatic camera photographed 100 speeding vehicles.
E. Not more than 100 vehicles drove past the police during the hour in which the police photographed 49 speeding vehicles.
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装饰抹灰砂浆用水量控制。用水量没有严格的控制，但要适量，如水磨石，若面层砂浆用水量过多，则会降低水磨石的强度和耐磨性。( )
A. 对
B. 错
抹灰工程中对砂的质量要求是：煤屑、云母等不超过砂质量的15%。( )
A. 对
B. 错
The seventeenth-century physicist Sir Isaac Newton is remembered chiefly for his treatises on motion and gravity. But Newton also conducted experiments secretly for many years based on the arcane theories of alchemy, trying unsuccessfully to transmute common metals into gold and produce rejuvenating elixirs. If the alchemists of the seventeenth century had published the results of their experiments, chemistry in the eighteenth century would have been more advanced than it actually was. Which one of the following assumptions would allow the conclusion concerning eighteenth-century chemistry to be properly drawn
A. Scientific progress is retarded by the reluctance of historians to acknowledge the failures of some of the great scientists.
B. Advances in science are hastened when reports of experiments, whether successful or not, are available for review by other scientists.
C. Newton’s work on motion and gravity would not have gained wide acceptance if the results of his work in alchemy had also been made public.
D. Increasing specialization within the sciences makes it difficult for scientists in one field to understand the principles of other fields.
E. The seventeenth-century alchemists could have achieved their goals only if their experiments had been subjected to public scrutiny.
特种用途抹灰砂浆，常用的特种砂浆有：耐酸砂浆、保温砂浆、防水砂浆等。其配制方法通常采用体积比。( )
A. 对
B. 错
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