【名词&注释】
改革开放(reform and opening)、调节作用(regulation)、延安整风运动(yan ' an rectification movement)、主要内容(main contents)、市场经济体制(market economy system)、市场机制(market mechanism)、重大突破(great breakthrough)、反对官僚主义、反对宗派主义、反对主观主义
[单选题]神经细胞动作电位的超射值接近于 ( )
A. 钾平衡电位
B. 钠平衡电位
C. 钠平衡电位和钾平衡电位之和
D. 钠平衡电位和钾平衡电位之差
E. 锋电位减去后电位
根据以下内容,回答下面的题目。Investors can _51_ money simply by loaning it.The money they loan is called capital.Security (担保) is an expensive item which the borrower mortgages (抵押) to the investor to show that he intends to _52_ the debt.The way investors make money on loans is to charge interest.Interest is money that _53_ pay to investors for the use of their money.Interest is usually a certain percentage of the capital.Investors sometimes _54 ten percent or more interest per year.The interest may be calculated daily, monthly, or yearly.The interest must be _55_ before the capital can be repaid.If the interest is not _56_ the agreed rate, the interest is added _57_ the capital.Then the borrower has _58_ pay interest on the unpaid interest _59_ on the capital.A debt can grow quickly this way.If the total of the capital and accumulated interest gets too high, the investor will take _60_ of the item used as security and sell it to get his money back.__________
根据以下选项,回答下面的题目:A.虹膜 B.脉络膜 C.巩膜 D.角膜 E.睫状体 构成眼球壁血管膜后部的是 ( )