问题描述:
[单选]
测定粗灰分的灰化温度为()
A.120℃
B.65℃
C.105℃
D.550℃
参考答案:查看无
答案解析:无
☆收藏
答案解析:无
☆收藏
上一篇:检索选修四门以上课程的学生总成绩,并要求按总成绩的降序排列出来。正确的SELECT语句是()。 A.SELECT SNO, SUM(GRADE)FROM SC GROUP BY SNO ORDER BY 2 DESC HAVING COUNT(*)>= 4; B.SELECT SNO, SUM(GRADE)FROM SC GROUP BY SNO HAVING COUNT(*)>=4 ORDER BY 2 DESC; C.SELECT SNO, SUM(GRADE)FROM SHAVING COUNT(*)>=4 GROUP BY SNO ORDER BY 2 DESC; D.SELECT SNO, SUM(GRADE)FROM SC ORDER BY 2 DESC GROUP BY SNO HAVING COUNT(*)>=4;
下一篇:测定粗灰分时首先要炭化,其温度为()
- 我要回答: 网友(3.137.163.208)
- 热门题目: 1.木兰属的种子具有红色肉质假种 2.()电磁场是矢量场。 3.临床上将耳聋的程度分为几级?