【单选题】等离子弧根据电源电极的不同接法和产生的形式不同,可分为转移型、非转移型、()
【判断题】我国实行宗教信仰自由,因此,宗教信仰是我们提倡的。()
【单选题】Flying by air has never been safer due to _____.
A.
the great advancements in auto-landing
B.
the huge improvements in technology and design
C.
the use of pilotless planes
D.
the use of “fly by wire”
【判断题】我国实行宗教信仰自由,因此,宗教信仰是我们提倡的信仰()
【单选题】He is used to flying by air and on no occasion ______ frightened.