【单选题】Her hobby is ______ taking photos _____ collecting stamps. It’s growing flowers.
【简答题】Her hobby is ______ taking photos _____ collecting stamps. It’s growing flowers.A. not only; but also B. either; or C. neither; nor D. both; and
【单选题】Which of the following is NOT her hobby?
【简答题】Instead of staying at home to care for the kids, many mothers work to help support their families. But what does a mother do when her child is sick? Sophia Fowkes worked as a computer programmer befor...
【单选题】粗骨料的级配按供应情况有()和()两种级配
【判断题】粗骨料的级配按供应情况有连续和单粒级两种之分。
【简答题】在具有32位逻辑地址的两级页表机制中,可以为外部页号留出10位,内部页号留10位,其余的留作页内偏移量。那么,系统规定的页面长度为( ),进程的长度最大可以达到( )。
【多选题】对于粗骨料的级配的描述,以下正确的有?
A.
粗骨料级配按供应情况可分为连续粒级和单粒粒级两种
C.
用连续粒级配制的混凝土一般工作性良好,不易发生离析现象,易于保证混凝土的质量,便于大型混凝土搅拌站使用,适合泵送混凝土
D.
单粒粒级骨料配制混凝土会加大水泥用量,对混凝土的收缩等性能造成不利影响
E.
单粒粒级骨料可与连续粒级混合使用,以改善其级配或配成较大粒度的连续粒级
【单选题】已知方程 的一个特解为x,于是方程的通解为()