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问题 单项选择题

设L是连接点A（1，0）及点B（0，-1）的直线段，则对弧长的曲线积分等于（）。

A.-1

B.1

C.

D.

答案

参考答案：D

解析：

曲线积分分为坐标积分和曲线积分。L是连接A，B两点的直线，则直线的方程为：；对直线下的部分积分：。

填空题

浙江省工商系统的计算机软件按开发类型和应用范围分成（）和（）两类。
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单项选择题

When anyone opens a current account at a bank, he is lending the bank money. He may (1) the repayment of the money at any time, either (2) cash or by drawing a check in favor of another person. (3) , the banker customer relationship is that of debtor and creditor who is (4) depending on whether the customer’s account is (5) credit or is overdrawn. But, in (6) to that basically simple concept," the bank and its customer (7) a large number of obligations to one another. Many of these obligations can give (8) to problems and complications but a bank customer, unlike, say, a buyer of goods, cannot complain that the law is (9) against him.

The bank must (10) its customer’s instructions, and not those of anyone else. (11) , for example, a customer opens an account, he instructs the bank to debit his account only in (12) of checks drawn by himself. He gives the bank (13) of his signature, and there is a very firm rule that the bank has no right or (14) to pay out a customer’s money (15) a check on which its customer’s signature has been (16) . It makes no difference that the forgery may have been a very (17) one, the bank must recognize its customer’s signature. For this reason there is no (18) to the customer in the practice, (19) by banks, of printing the customer’s name on his checks. If this (20) forgery, it is the bank that will lose, not the customer.

1（）

A.acquire

B.deposit

C.demand

D.derive
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