- I am out of breath. I can't go any further.- _______ ! I'm sure you can make it .
A:No problem.
B:What a pity
C:Not bad
D:Come on
设集合M =x|x=k2+14,k∈Z,N =x|x=k4+12,k∈Z,则 ( )
红外线、紫外线、X射线都有着广泛的应用,如图所示.下面的判断中正确的写“对”,错误的写“错”.
①医院透视用到的是X射线____
②电视遥控器用到的是紫外线____
③非接触式体温计用到的是红外线____
④夜间作战使用的夜视仪用到的是红外线____.
The man likes giraffes _____ they are very interesting.