Not only Tom but also his wife ____fond of watching television.
A.are
B.were
C.be
D.is
答案:D
"The Big Race" is a kind of _____.[ ]
A. thrillers
B. documentaries
C. comedies
D. action movies
某透明媒质对于空气的临界角(指全反射)等于30°,光从空气射向媒质时的布儒斯特角是( )。
A.70.5° B.39.6°C.35.8° D.28.6°