题目

下列将电能转化为机械能的装置是（ ）   A．发电机        B．电动机          C．日光灯          D．  电热壶 答案：B解：A、发电机是将机械能转化为电能，不合题意； B、电动机是将电能转化为机械能，符合题意； C、日光灯是将电能转化为光能，不合题意； D、电热壶是将电能转化为内能，不合题意． 故选B． Visiting Canada This Summer?        A visit to Canada begins with a stop at customs. This can be done quickly if visitors keep in mind the following general tips: *     Most American visitors are allowed into Canada after answering a few simple questions. In some cases, customs officers may examine your car and your possessions. *     You must have photo identification when you cross the border. If you are travelling with children who are not your own, they should have their own identification, and you need a permission note from their parents or guardians. *     You can bring with you no more than 40 ounces (1.14 litres) of liquor or 52 ounces of wine or 24 containers of beer (355 ml or 12 oz. each). Please note that we classify coolers according to the type of alcohol they contain. Also, you may not bring more than 200 cigarettes. 50 cigars, 200 tobacco sticks, and 200 grams of manufactured tobacco without paying duty. *     Generally speaking, you are allowed to bring personal goods for your trip into Canada. *     You cannot bring handguns into Canada unless you have a special permit and only under specific conditions. You cannot bring long guns into Canada except in special cases such as hunting season or for use in a competition. You must declare all guns at customs or they will be seized. You cannot bring weapons such as mace into Canada in any cases. For more information, see pamphlet Importing a Firearm or Weapon into Canada. *     You may qualify for a rebate （折扣）of the goods and services tax (GST) or the harmonized （协调的）sales tax (HST) you pay on accommodation （住所）and shopping you make while in Canada. For more information, see Tax Refund/or Visitors to Canada. *     You may also bring gifts worth up to CAN$60 each for your friends or relatives in Canada without paying duty, as long as these do not consist of alcoholic drink or tobacco products. *     Please do not wrap these gifts until after you have cleared customs, since an examination may be required. Welcome to Canada and have a pleasant stay! 61. You can bring _____ litres of wine. A. 1.2            B. 1.5             C. 1.7                D. 1.9 62． You may get your money from the tax at _____ .        A. the bank            B. the shop            C. accommodation         D. customs 63. What does the underlined word "they" refer to? A. All guns.                             B. Mace and pepper spray. C. Handguns.                           D. Long guns. 64. The topic of the passage could be _____. A. clearing customs in Canada B. things forbidden to bring into Canada C. inviting people to visit Canada this summer D. introducing Canadian customs