目前工业超声波探伤使用较多的压电材料是:()
A.石英
B.钛酸钡
C.锆钛酸铅
D.硫酸锂
参考答案:C
Life of Pi ________ by Ang Lee and his team is widely recognized as a best movie picture.
A.developed
B.composed
C.set
D.shot
关于淋病的描述,以下错误的是()
A.可通过污染的衣物传播
B.分娩时可感染新生儿
C.淋球菌在潮湿环境中可生存较长时间
D.是目前发生率最高的性传播疾病
E.以侵袭生殖泌尿系统黏膜和外阴上皮为主