【单选题】Which of the following is not the reason why the speaker built the telescope?
A.
The telescopes are awesome
B.
To explore the universe in new ways
C.
Telescope is a new technology of astronomy
【单选题】Those instruments, such as the microscope and the telescope, which are essentially aids to the eye, have certain features______.
【多选题】如下各项中,属于实现解吸基本手段的有()
【单选题】The astronomers actually control the telescope in the operating room instead of being near the telescopes.
【简答题】A.The telescope. B.The harmonica. C.The piano. D.The light bulb.
【简答题】Intel的teaming技术包括AFT、( )、SFT、( )、GEC、IEEE802.3ad
【简答题】A.The telescope. B.The harmonica. C.The piano. D.The light bulb.
【简答题】将上面scores数据框,进行melt()转换,以姓名,学期为识别列,以Chinese、math、english为测量列,形如: 可写作: score_melt<-_______(_______,id.vars=_____)< /div>