汽轮机每运行1小时,金属材料就消耗了()。
A.1小时
B.1.5小时
C.2小时
D.3小时
参考答案:A
A computer is programmed to generate a list of multiples of prime numbers 2,3 and 5, as shown below:
How many integers less than 100 will appear on all of the lists of programs produced above ?()
A.None
B.1
C.3
D.5
E.An infinite number of integers
定位尺分“43”、“50”和“()”、“75”四种规格,根据钢轨钻孔的轨型选择合适的定位尺。
A.30
B.40
C.50
D.60