泵车在正常情况下，主油缸顶缸后的系统压力会达到（）Mpa。
A、20
B、28
C、31.5
D、38
参考答案：C
1295330000改写成用“万”作单位是______，改写成用“亿”作单位的数是______，精确到十分位是______亿．
—Kate, we need some vegetables for dinner. Could you go and buy ________?
—Yes, sure. But I don't have ________ money.[ ]
A. any, any
B. some, any
C. any, some
D. some, some
