【判断题】
TCP/IP协议产生于1969年。( )
【单选题】
The moon ____ to a large mirror which reflects the sun’s light to the earth.?
【单选题】
The ____ problem of bring a spaceship back from the moon has been solved.
【单选题】
If you got to the moon, you ____________ about six times as high as on the earth.
【单选题】
The _____problem of bringing a spaceship back from the moon has been solved.
【判断题】
The expression as American as apple pie is a product of imagination.
【单选题】
Who was the foremost novelist of the American Depression of the 1930s?
【单选题】
The first American writer of local color to achieve wide popularity was?____.
【单选题】
19. The American people _____ a president every four years.
【单选题】
An American breakfast with pineapple juice, ( )turned over, bacon, toast and tea.