Why were the French troops in Canada defeated by the British during the Seven Years.War?（）
A. Because they were not used to the weather in Canada.
Because they did not get support from the local people.
C. Because they did not receive the supplies they needed so badly.
D. Because the British had larger and better settlements in Canada.
用无水氯化钙作干燥剂是，适用于（）类有机物的干燥。
A. 醇、酚
B. 胺、酰胺
C. 醛、酮
D. 烃、醚
中国近代首批建筑师多毕业于美国的（）大学，那里曾是（）派的大本营。
弹簧管式压力表由哪些零部件组成？并说明其传动机构中各零部件的作用。
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