Neither Tom nor his parents _____ at home. [ ]
a. is
b. are
c. has
d. was
b
浮球测量液位，其指示值与介质的重度有关
结核性支气管扩张的好发部位在（）
A.右上叶支气管
B.左舌叶支气管
C.左下叶支气管
D.上叶尖、后段支气管
E.右下叶支气管
