MCS-51外扩ROM,RAM和I/O口时,它的数据总线是()。
A.P0
B.P1
C.P2
D.P3
参考答案:A
Which of the following statement about weighting schemes used in constructing stock market indexes is FALSE()
A. The Nikkei Dow is a price-weighted index.
B. The Standards and Poor’s indexes are market value-weighted indexes.
C. A market-weighted index automatically adjusts for stock splits.
关于城镇道路路基压实,下列说法正确的有()
A.可使用的压实方法(式)有重力压实(静压)和振动压实
B.所选用压路机的最快压实速度不宜超过4km/h
C.对路基进行压实时,应从路基边缘向中央进行
D.压路机轮外缘应紧靠路基边进行压实,减小漏夯面积
E.采用小型夯压机补夯实时,夯击面积重叠1/4~1/3