Dave Smith is 12. He has a sister .Her name is Jenny .She is 8.

Dave has a dictionary .It is blue .The dictionary is in his black backpack .He has a computer game and he likes it .Jenny has a watch .It is red .She likes it very much. She has a good pencil case ,too .It’s white . Her pencil  ,ruler ,eraser and pen are in the pencil case. Her pencil case is in her yellow backpack.

小题1:What’s Jenny’s family name?

A．White

B．Black

C．Smith

D．Brown小题2:What color is Dave’s dictionary?

A．It’s blue.

B．It’s black.

C．It’s red.

D．It’s white.小题3:_________ things are in Jenny’s pencil case.

A．One

B．Two

C．Three

D．Four小题4:What color is Jenny’s backpack?

A．It’s black

B．It’s red

C．It’s green

D．It’s yellow小题5: 下面哪项陈述是正确的？

A．Dave is 8

B．Jenny has a computer game

C．Dave’s backpack is black

D．Jenny has a sister

一名消防队员从一平台上无初速度跳下，下落0.8s后双脚触地，接着他用双腿弯曲的方法缓冲，又经过0.2s重心停止了下降，在着地过程中，可估计地面对他双脚的平均作用力为（　　）

A．自身所受重力的10倍

B．自身所受重力的8倍

C．自身所受重力的5倍

D．自身所受重力的2倍