()用来反应铸造用硅砂的颗粒形貌。
参考答案:角形系数
—How many English parties ____ by the end of last term?
—Sorry, I can't remember. [ ]
A. did you have
B. had you had
C. have you had
上级国家机关的决议、决定、命令和指示,如有不适合民族自治地方实际情况的,自治机关可以如何处理( )
A.报经该上级国家机关批准后变通执行B.停止执行,并自行制定适合本地区的决议等C.提请该上级国家机关重新制定适合本地区实际情况的决议等D.报请国务院决定