码长为31的汉明码，其监督位r应为（ ） A: 5 B: 7 C: 6 D: 8

1 Complete the words. ► o u t s t a n d i n g outstanding 1 e_ _ _ v a l e n t ____ 2 _ _ _ d u c e ____ 3 _ _ _ p o r t i n g r o _ _ ____ 4 _ _ _ i v i d u a l ____ 5 a _ _ r d ____ 6 a c _ _ e v e ____ 7 w_ _ n _ r ____ 8 p _ _ z e ____

4 Complete the words. 25ba s t r a i g h ‍t straight 1 p o i n _ _ _ ____ 2 L - s h a _ _ _ ____ 3 c u r _ _ _ ____ 4 r e c t a n _ _ _ ____ 5 v e r t i _ _ _ ____ 6 c i r c u _ _ _ ____ 7 r o _ _ _ ____ 8 c i r _ _ _ ____ 9 t r i a n _ _ _ ____ 10 h o r i z o n _ _ _ ____ 11 s q u _ _ _ ____ 12 p a r a l _ _ _ ____ 13 d i a m _ _ _ ____ 14 s _ _ _ - s h a p e d ____

1 Complete the words ► p r e v e n t prevent 1 i n f _ _ _ i o n ____ 2 b _ n d _ g e ____ 3 t h _ r _ _ g h l _ ____ 4 w _ _ n d ____ 5 b l _ _ d ____ 6 s _ m p t _ m ____ 7 t _ _ p o r _ r _ l y ____ 8 d _ v _ l _ p ____

4 Complete the words. ► h u m a n human 1 p r d c t b l e ____ 2 d i s e a r ____ 3 f m n e ____ 4 h r m f l ____ 5 a t m o e r e ____ 6 e n v r o m n t ____ 7 p l l t n ____ 8 l q u d ____ 9 d s s e ____ 10 c l m t ____

深度为5的二叉树至少有()个结点。 A: 5 B: 6 C: 7 D: 31

左手食指负责的键位有（）T、R、G、F、V、B共八个键 A: 4、5 B: 5、6 C: 3、4 D: 6、7

变频器的控制电路端子有( ) A: R、S、T B: U、V、W C: 5、6、7 D: 8、9

1 Complete the words. ► h a i r c u t haircut 1 f r _ _ _ e ____ 2 s _ _ s s _ r _ ____ 3 h _ _ r s t _ _ e ____ 4 h _ _ r d _ _ _ r ____ 5 p _ _ t _ n g ____ 6 t _ _ m ____ 7 c _ l _ _ r ____ 8 b l _ w – d r _ ____

2 Complete the missing letters. ► m o v i e movie 1 g _ _ b _ g _ ____ 2 s _ b _ _ y ____ 3 c _ _ s _ t ____ 4 c _ _ d y ____ 5 a t _ _ _ n _ y ____ 6 g _ s _ l _ _ e ____ 7 t r _ _ _ p_ _ t _ t _ _ n ____ 8 b _ l l _ _ _ d ____