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Section B Directions: After reading the following passage, you will find 5 incomplete statements mumbered 1 to 5. You should complete the statements according to the passage with no more than 3 words. Travel Agents Nowadays many tourists and business people often turn to travel agents in order to free themselves from travel planning frustrating and time consuming. Travel agents assess their needs and help them make the best possible travel arrangements. In general, travel agents give advice on destinations and make arrangements for transportations, hotel accommodations, car rentals, tours, and recreations. They may also advise on weather conditions, restaurants, and tourist attractions. For international travel, agents also provide information on customs regulations, required papers (passports, visas, and certificates of vaccination), and currency exchange rates. Travel agents also promote their services, using telemarketing, direct mail, and the Internet. They make presentations to social and special interest groups, arrange advertising displays, and suggest company sponsored trips to business managers. Travel agents no longer receive commission payments ( 手续费 )from domestic airlines, and agents face increasing competition from the Internet for low cost fares. In an effort to find a place in the market, many travel agents now specialize in traveling to certain regions or for certain groups of people, such as honeymooners, grandparents, or ethnic groups.
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【单选题】水轮机的效率是【 】。
A.
水轮发电机出力与水流出力之比
B.
水轮机出力与水流出力之比
C.
水轮机的机械效率
D.
水轮机的水力效率
【简答题】水轮机的效率是()。 (A)水轮机发电出力与水流出力之比 (B)水轮机出力与水流出力之比
【单选题】水轮机的效率是
A.
水轮机从水流中获得的功率与单位时间内通过水轮机水流的总能量之比
B.
水轮发电机组发出的电功率与单位时间内通过水轮机水流的总能量之比
C.
发电机的出力与水轮机传递给它的功率之比
D.
水轮机传递给发电机的功率与水轮机输入功率的比值
【单选题】下列农药不属于高毒农药的是[ ]。
A.
吡虫啉
B.
久效磷
C.
甲胺磷
D.
1605
【单选题】产业组织理论中芝加哥学派的首席代表是( )。
A.
弗里德曼
B.
科斯
C.
波斯纳
D.
斯蒂格勒
【简答题】法人的三个特点是: 、 、 。
【单选题】产业组织的芝加哥学派首席代表是( ) 。
A.
弗里德曼
B.
科斯
C.
马歇尔
D.
斯蒂格勒
【单选题】水轮机的效率是水轮机的
A.
轴端出力与输入水流的出力之比
B.
最大出力与输入水流的额定水流之比
C.
额定出力与输入水轮机的水流出力之比
D.
额定出力与输入水轮机的最大水流出力之比
【判断题】水轮机的效率是水轮机的轴功率与输入水轮机的水流功率之比
A.
正确
B.
错误
【多选题】水轮机的效率是( )。
A.
水轮机出力与水流出力之比
B.
水轮发电机出力与水流出力之比
C.
水力效率、容积效率和机械效率之和
D.
水力效率、容积效率和机械效率之积
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