什么叫后吹,有何危害?
参考答案:
吹炼终点钢水成分,温度达不到所炼钢种成分叫后吹。危害:钢水过氧化,夹杂物多,侵蚀炉衬,易造成号外及钢种改判,易产生漏钢烧坏设备。
《中国药典》2000年版一部规定,血竭中血竭素的含量测定采用
A.桔梗B.党参C.木香D.川木香E.白术
Patch Grove Analytics is evaluating candidates for an economic analyst internship. To demonstrate his grasp of the effects of consumer behavior on aggregate demand, a candidate makes the following statements during his interview: Statement 1: The wealth effect occurs when consumers feel wealthier at higher price levels because their wages will also increase, and spend more in the current period as a result. Statement 2: Intertemporal substitution accounts for consumers’ tendency to increase their planned purchases in the current period and decrease planned future purchases when interest rates increase. Are these two statements correctStatement 1 Statement 2()①A. IncorrectIncorrect ②B. IncorrectCorrect ③C. Correct Incorrect
A. ①
B. ②
C. ③