梁的跨度为6米，板的跨度为4米，当设计无特别要求时，楼盖混凝土拆模时现场混凝土强度应

分税种确定税基，要根据不同税种的征税依据分别估算。用个人所得法确定个人所得税的税基，用生产总值法确定（）的税基；用利润总额法确定企业所得税税基等。

A.资源税

B.增值税

C.消费税

D.企业所得税

工作层面的培训需求分析主要包括()。

A．工作的饱和程度 

B．工作的安全程度 

C．工作的难易程度 

D．工作内容和形式的变化 

E．工作的复杂程度

男性肝硬化患者常出现性欲减退，睾丸萎缩， * * 发育，蜘蛛痣。其主要原因是（）。

A.垂体功能减低

B.雌激素过多

C.雄激素过多

D.肾上腺皮质激素过多

E.脾功能亢进

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.

15（）

A.by

B.on

C.with

D.for

简述人类睡眠分哪几种？特点是什么？