This is the twin’s bedroom. The two beds looks the same（看起来像）. This bed is Wang Lei’s. It is near the window. That one is Wang Fang’s. It’s behind the door. The twins have one desk and two chairs. Their clock, books and pencils are on the desk.  Their schoolbags are on the chairs. Wang Lei’s shirt is on his bed. On Wang Lei’s bed there is her skirt. It’s yellow. The room isn’t big, but nice.

小题1:This is_______ bedroom.

A．your

B．my

C．our

D．Wang Lei and Wang Fang’s小题2:Wang Lei and Wang Fang are________.

A．friends

B．brother and sister

C．sisters

D．brothers小题3:The bed behind the door is __________.

A．Wang Lei’s

B．Wang Fang’s

C．theirs

D．different小题4: _______on her bed.

A．Wang Lei’s sweater

B．Wang Lei’s yellow shirt

C．Wang Fang’s skirt

D．The sweater小题5: The bedroom is __________.

A．not big but new

B．new

C．nice

D．big and nice

对长度为n的线性表进行顺序查找，在最坏情况下所需要的比较次数为______。

A．log2n

B．n/2

C．n

D．n+1