问题
单项选择题
在轮机值班（）时，应当对当时所管辖的机器工作情况、工作参数加以验证、分析，并保持在正常范围内。
A.开始
B.期间
C.结束
D.任何时候
答案
参考答案：A
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在轮机值班（）时，应当对当时所管辖的机器工作情况、工作参数加以验证、分析，并保持在正常范围内。
A.开始
B.期间
C.结束
D.任何时候
参考答案：A
The Canadian people are made up of different national races.The first ____ settlers of the country were the Indians. It was said that the Indians entered this continent ___ the Bering Strait(白令海峡) and Sea from eastern Asia at most 10,000 years ____.When Europeans first ____ the country，Indians were living in most of areas ___ forests.There were only ____ Indians in the provinces near the Atlantic Ocean. The second group of people to enter Canada ____ the Eskimos.They ____ the Bering Strait from Asia less than 3,000 years ago.There are few __ of their early movements.The first white settlers in Canada were the ____.They came in greatest ____ to Quebec，but also to Nova Scotia，____ they cleared farms on the southern side of the Bay of Fundy.The French built their castles at Quebec City，and cleared farms out of the forests in the area.____ the time of the British conquest(征服) in 1763，there had been about 60,000 Frenchmen in Canada，____ chiefly between Quebec and Montreal.There were not many British in Canada ____ American Revolution drove large numbers northward. Throughout the 19th century，____ British people came to Canada.The descendants(后代) of these people ____ England，Scotland and Ireland now make ____ about half of the population.Around the ____ of the century people came in increasing numbers from Europe and the largest numbers came ____ Central and EasternGermans，Czechs，Poles，Rumanians and Ukrainians.
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