气管、支气管腺瘤的病理学类型包括()
A.支气管类癌
B.腺样囊性癌
C.黏液表皮样癌
D.粘液腺瘤
E.多形性混合瘤
参考答案:A, B, C, D, E
The flu is believed ________ by viruses that like to reproduce in the cell inside the human nose and throat.
A.causing
B.being caused
C.to be caused
D.to have caused
关于声现象,下列说法正确的是( )
A.声音传播需要介质,真空不能传播声音
B.声音在空气中传播最快
C.声源振幅越大,发出声音的音调就越高
D.乐器发出的声音不会成为噪声