熔剂是指冶金过程中用作造渣的配料,其原料有()、()、()、()、()等。
参考答案:石灰石、白云石、硅石、萤石、铁矾土
.Polly found herself_________ up at a man_________with his hand___________on her arm.
A.staring; standing; resting
B.stared; stood; rested
C.stare; stood; rested
D.to stare; standing; resting
异丙肾上腺素不宜用于
A.房室传导阻滞
B.心脏骤停
C.支气管哮喘
D.冠心病
E.感染性休克