与OLP发病因素无关的有() ["感染因素","创伤因素","遗传因素","神经精神因素","免疫学因素"]
农产品国际贸易已经()。 ["A.连续9年逆差 ","B.连续10年顺差 ","C.连续10年逆差 ","D.连续9年顺差"]
天南星具有的功效是() ["A.燥湿化痰,降逆止呕","B.燥湿化痰,祛风止痉","C.燥湿化痰,祛风解毒","D.燥湿化痰,止咳平喘","E.燥湿化痰,清热定惊"]
可以在一定程度上弱化时空或段落转换的视觉跳动()。 ["A.声音转场 ","B.特技转场 ","C.特写转场 ","D.承续转场 ","E.字幕转场"]
治疗风热咳嗽,痰热咳嗽的药组是() ["A.前胡、浙贝母","B.瓜蒌、天竺黄","C.竹茹、桔梗","D.白前、荆芥","E.旋覆花、马兜铃"]
交换机的主要功能是?