因为a>b(a、b都是非O的自然数),
那么2a<2b.
故答案为:×.
Bob: Hi! How are you doing?
Tom:小题1: .
Bob: I heard you went somewhere for vacation.小题2: ?
Tom: well, I went to Hainan Island.
Bob:小题3: ?
Tom: Yes,I went there with my parents.
Bob:小题4: ?
Tom: By plane.
Bob:小题5: ?
Tom: We stayed there for five days.There are many exciting things there,especially diving in the real sea!
Bob: That sounds great! I hope I can go there some day.
驾驶舱侧操纵杆的感觉力()。
A.内部弹簧直接产生
B.FCPC1计算机模拟
C.FCSC计算机模拟
D.以上都错