设一个三位数个位数字为a,十位数字为b,百位数字为c,请你写出这个三位数( )
100c+10b+a
Young people are under great pressure. Therefore, parents shouldn’t expect too much from them, for
it will only cause pressure to ________. [ ]
A. pick up
B. turn up
C. break up
D. build up
液氯气瓶上不能装设()安全附件。
A、易熔合金塞
B、防震圈
C、瓶帽
D、护罩