It was three years after the first satellite launching that a (spaceship) containing a man made a successful flight.选择能代替括号里的选项
A、a space station
B、a space vehicle
C、a space rocket
D、a Spacelab
第1题:
设A="abcd"+space(5),B="efgh",则A-B的结果与下列______。选项的结果相同。
A.abed+space(5)+"efgh"
B.abed+"efgh"
C.abcd+"efgh"+space(5)
D.abcd+efgh"+space(1)
第2题:
第3题:
第4题:
第5题:
第6题:
第7题:
第8题:
第9题:
第10题:
you are entering a space containing poisonous vapors
you are entering a space containing explosive gases
the regulator of the breathing apparatus malfunctions
the face piece of the breathing device is too tight
第11题:
To poke fun at the ignorance of most science fiction readers
To introduce a daunting challenge that will have to be addressed before human interstellar space travel can become possible
To draw a comparison between the attempts of humans to voyage in space and the more successful attempts of other civilizations
To draw an amusing distinction between a supposed danger of space travel, as presented in the popular media, and the actual challenges posed by interstellar space travel, as perceived by scienfists
To suggest that the concept of human interstellar space travel is as much of a myth as the “Little Green Men” that appears in science fiction movies and television programs
第12题:
第13题:
The bypass valve on a self-contained breathing device should be opened if ______.
A.You are entering a space containing poisonous vapors
B.You are entering a space containing explosive gases
C.The regulator of the breathing apparatus malfunctions
D.The face piece of the breathing device is too tight
第14题:
第15题:
第16题:
第17题:
第18题:
第19题:
第20题:
第21题:
第22题:
FREE_SPACE indicates only the space that is currently unallocated.
ALLOCATED_SPACE indicates only the space currently allocated and in use.
FREE_SPACE indicates only the space that is currently allocated and available for reuse.
ALLOCATED_SPACE indicates both the space currently allocated and used, and the space that is available for reuse.
FREE_SPACE indicates both the space that is currently allocated and available for reuse, and the space that is currently unallocated.
第23题:
A cargo handling room
A space in which cargo hose is stored
An enclosed space containing cargo piping
All of the above