单选题 The phrase "Keep track of" in sentence "Stores use computers to keep track of

Products and check you out at the cash register" means what? ( )

单选题 Computer language has only two letters, what are they? ( )
（10.0 分）

单选题 In（） ，Bill Gates and Paul Allen Wrote a program for the Altair 8800 and founded the Microsoft Corporation.
（10.0 分）

单选题 Who wrote the first compiler? ( )
（10.0 分）

单选题 Surf the Web means what? ( )

单选题 When did Computers start to become popular with big companies ? ( )

单选题 Which word means "发明家"？( )
（10.0 分）

单选题 What is the characteristic of the first programs?（ ）
（10.0 分）