题干
. He told me to leave out the articles in this sentence ________ it is possible.
A：where
B：in which
C：that
D：what
答案(点此获取答案解析）
A
A：where
B：in which
C：that
D：what
,5)和点O (0,0)，B是y轴右侧⊙A优弧上一点,则∠OBC 的余弦值为( ).