1999世界卫生组织和国际高血压学会制定和修改的新的正常人的血压标准为A．血压＜12

1089减去45的4倍的差再除以9，商是多少？（　　）

A．（1089-45×4）÷9

B．1089-45×4÷9

C．（1089-45）×4÷9

D．1089-（45×4）÷9

用所给词的适当形式填空（每空一词，每空1分，计10分）

小题1:Lin Shuhao is a very good basketball ___________( [‘pleIə] )

小题2:Watching the lion dance is very _____________(interest).

小题3:They have sports ____________(two) a week.

小题4:__________(not) play in the street. It’s dangerous.

小题5:Daniel with his parents often___________(go) shopping in the supermarket.

小题6:The students are sitting___________(围绕) their teachers.

小题7:Amy has ___________(足够的)money for the hair clips.

小题8:This meal gives him __________ (热量)for his after-school activities.

小题9:What about __________ (庆祝) Halloween in different ways?

小题10:They have a Computer lesson on ________ (星期四).

与情绪形成有关的3个要素是（）

A.环境、心境、生理变化

B.情景、心境、条件反射

C.情景、刺激、生理过程

D.认知、反应、结果评价

E.情景、认知、生理变化

尔朱荣纵兵杀死王公大臣多达两千多人，史上把这一事件称为什么？

森林经理学的主要任务和内容。