在人耳中，真正感受声波的振动并产生神经冲动的部位是（）A．前庭 B．半规管 C．耻蜗

闭合性气胸，积气量小于该侧胸腔容积百分之几时不需抽气（）

A.5%

B.10%

C.15%

D.20%

E.25%

情景作文。

     人人都有朋友 初中三年同学之间结下深厚的友谊。假设你叫张华，你的笔友李敏在下面

这封信中介绍了他的学友，请你写一封70 词左右的回信，说说你好友的基本情况和兴趣爱好。

注意：1、回信的开头和结尾已给出，但不计入总词教：

          2、信中请勿使用朋友的真实校名和姓名

Dear Zhang Hua,

     How are you? In this letter I'd like to say something about my best friend.

     My best friend is Gao Jun. He is fifteen. He is tall with short hair. We are in the same class.

     Gao Jun is smart and friendly in class, he listens to the teachers carefully At home, he often helps

his mother with housework He does well in all his lessons. And he is always ready to help others. So,

everyone in our class likes him.

     Gao Jun seems to have a special interest in writing. He wants to be a writer in the future.

     Both of us like playing basketball. We usually play it after class. We feel happy when we are together.

I think we will be good friends forever.

     What about your best friend? Can you tell me something about him (her)?

                                                                                                                                         Yours,

                                                                                                                                         Li Min

Dear Li Min,

     Thank you for telling me so much about your best friend Gao Jun. __________________________

____________________________________________________________________________________

                                                                                                                                   Yours,

                                                                                                                                  Zhang Hua

关于慢性肺源性心脏病的护理措施，下列哪项不正确（）

A.禁用麻醉剂

B.慎用镇静剂

C.给予每分钟4～6L氧气吸人

D.肺心功能失代偿期应卧床休息

E.高热量、高蛋白质、高维生素饮食

句子和短语有什么样的本质区别？

要估计总体分布的特征，抽样调查是根据样本均值的（）。

A.样本分布

B.抽样分布

C.均匀分布

D.正态分布