Messages that are sent electronically over a network．(72)A series of instructions(commands) performed in a sequence specifying actions to accomplish a task．(73)The character code built into most modern personal computers．(74)The minimal unit of information，it can have the value 1 or 0．(75)The brains of a computer, it contains the ALU，the clock，many registers，the bus interface，and circuitry that makes these parts work together．

A．input

B．output

C．data

D．E-Mail

[单选题]D．irections: There are 15 incomplete sentences in this section. For each sentence there are four choices marked A, B, C and D. Choose one answer that best completes the sentence and blacken the corresponding letter on the answer sheet.6. ______ the l

[单选题]The African way of communication sent messages______.A． in a special wayB． over a very short distanceC． by a musical instrumentD． at a rather slow speed

[单选题]They sent the letter to me ______ mistake.A.byB.forC.onD.with

[单选题]The error messages given by a C compiler show the message text,the most common cause of the error,and a suggestion for (73) the error.(73) A．upfsyingB．fixingC．changingD．Editing

[单选题]The ______ in e-mail messages has affected almost every computer around the world and has caused the damage of up to US$1 billion in North America.A．illnessB．virusC．weaknessD．AttachmentA．B．C．D．

[单选题]The error messages given by a C compiler show the message text, the most common cause of the error, and a suggestion for(73)the error.A．updatingB．fixingC．changingD．Editing

[单选题] The （72） in e-mail messages has affected almost every computer around the world and has caused the damage of up to US$1 billion in North America.（72）A． illnessB． virusC． weaknessD． attachment

[单选题]The(72)in e-mail messages has affected almost every computer around the world and has caused the damage of up to US$1 billion in North America．A．illnessB．virusC．weaknessD．attachment

[单选题]D．eploying enhanced broadband services over existing network infrastructure （ ）in increase of the network complexity and therefore,extra expenses on network management and maintenancA．[1分]B．resultsC．resultedD．resultingE．result

[单选题]抗-DNP-OVA+DNP-OVA