人体不能同时进行的两项生理活动是[ ]
A．呼吸和消化
B．心跳和呼吸
C．消化和吸收
D．呼吸和吞咽
答案：D
下列计算正确的是[ ]
A．x5﹣x4=x
B．x+x=x2
C．x3+2x5=3x8
D．﹣x3+3x3=2x3
按要求完成句子。
小题1:Allan goes to school by bus. (就画线部分提问)
Allan go to school?
小题2:Rick goes to school at 6:00 (对画线部分提问)
does Rick go to school?
小题3:Mr Green goes to work by car every day. (同义句转换)
My Green his car work every day.
小题4:打扫房间很容易。
It’s easy the classroom.
小题5:我可以和你交朋友吗？
Can I with you?
