题干
.
Viewers will have _____ second chance to see Saturday’s concert on _____ Channel 4 tonight.
Viewers will have _____ second chance to see Saturday’s concert on _____ Channel 4 tonight.
A：a; the
B：the; the
C：the; 不填
D：a; 不填
答案(点此获取答案解析）
D
是两个单位向量，则下列结论中正确的是( )