如图，A1测 的电流，A 测 的电流；若A1的示数是0.8A ，A 的示数是1.9A ，则通过灯泡L2的电流I2 = A ．
L1 ；总 ；1.1
Either you or one of your students ________ to attend the meeting ________ tomorrow.
A．are; to be held
B．is; being held
C．is; to be held
D．are; having held
阴囊透光试验阳性见于（）
A.阴囊鞘膜积液
B.睾丸肿瘤
C.以上都不是
D.阴囊橡皮肿
E.阴囊疝
