哪些是滴虫性和念珠菌性 * * 炎的临床表现()
A.外阴瘙痒
B.白带增多
C.尿频、尿痛
D.下腹压痛
E. * * 脓性分泌物
参考答案:A, B, C, E
To learn English well, we should find opportunities to hear English _____ as much as we can.
A.speak
B.speaking
C.spoken
D.to speak
分析在四线制转辙机表示电路中,4μF电容短路会出现什么现象?表示外线的交直流电压大约是多少?为什么?