为了保持成果的现势性，农用地质量影响因素发生变化后，应根据实际情况对定级成果进行全部更新或()。
A. 指定更新
B. 单元更新
C. 局部更新
D. 因素更新
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某计算机的地址线、数据线均为8位，一条两字节的相对寻址的无条件转移指令，存于内存20H和21H单元中，指令操作码存放在20H中，存放在21H中的位移量为15H。则取该指令时PC(程序设计数器)为(1)H，该指令执行结束时PC为(2)H。
A. 20
B. 21
C. 22
D. 41
Which of the following is not true of investment banks？______.
A. Investment banks help companies and governments issue securities, help investors purchase securities.
B. Investment banks manage financial assets, trade securities and provide financial advice.
C. Investment banks create capital goods.
D. Merrill Lynch, Morgan Stanley and Goldman Sachs are the world leading investment banks.
In the event of bankruptcy by the issuer, bonds that are subordinated, rank in terms of redemption
A. below all claimants
B. above shareholders but below other claimants
C. above shareholders and above "pari-passu" debt-holders but below all other claimants
D. above shareholders and employees but below all other claimants
IATA规定，等级货物包括下列各种货物：活动物；贵重货物；书报杂志类货物；作为货物运输的行李；尸体、骨灰；汽车等。()
A. 正确
B. 错误
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