设有以下说明语句： typedef struct { int n; char ch[8]; } PER;则下面叙述中正确的是( )。 A．PER是结构体变量名 B．PER是结构体类型名 C．typedef struct是结构体类型 D．struct是结构体类型名

The price-earnings ratio is calculated by dividing: A: Market value per share by earnings per share. B: Earnings per share by market value per share. C: Dividends per share by earnings per share. D: Dividends per share by market value per share. E: Market value per share by dividends per share.

The unit of Porter is () A: Characters per second B: Bit per second C: Frames per second D: Bytes per second

传输速率单位“bps”代表（）。 A: BYTES PER SECOND B: BITS PER SECOND C: BAUD PER SECOND D: BILLION PER SECOND

How much is the extra large tent A: $10 per day B: $450 per day C: $500 per day D: $600 per day

数据传输速率的单位“bps”代表（ ）。 A: bits per second B: baud per second C: billion per second D: bytes per second

per day, per week

How much do oranges cost right now A: $6 per pound B: $6 per tub C: $26 per tub D: $26 per box

Your only pay once someone clicks on your advertisement A: Search Per Click B: Referral Per Click C: Pay Per Click D: Advertisement Per Click

网路广告定价的方式有（ ） A: Cost per time B: Cost per Thousand Impression C: Cost per Action D: Cost Per Thousand Click-Thorough