神经元又叫______，是构成神经系统______基本单位．

为了探究声音的响度与振幅的关系，小明设计了5图所示的几个实验．你认为能够完成这个探究目的是（　　）

A．

B．

C．

D．

等渗性脱水血清钠浓度为（）

A.<130mmol／L

B.>150mmol／L

C.130～140mmol/L

D.130～150mmol／L

E.140～150mmol／L

1919年，毛 * * 在《（湘江评论）创刊宣言》中写道：“时机到了!世界的大潮卷得更急了!洞庭湖的闸门动了，且开了!浩浩荡荡的新思潮业已奔腾澎湃于湘江两岸了!顺他的生，逆他的死。”在此毛 * * 认为，挽救民族危亡必须

A．实行君主立宪

B．建立资产阶级代议制

C．走十月革命道路

D．开展“工农武装割据”

单词拼写

Sunday, April 6^th, Sunny

We went to Beijing on ___小题1:___(度假) today. The weather was ___小题2:__（晴朗的）.We__小题3:___（参观） the Great Wall in the morning. It is the ____小题4:__(最长的)in the world. There were many people there. I took quite a few ___小题5:___（照片）of the Great Wall. The guide there was very ___小题6:__（友好的）to us. She told us ___小题7:__（某些）about Beijing. The food in Beijing is very ___小题8:__（美味的). I __小题9:__(真的)like Beijing duck . We ate a lot in a restaurant. I have a good __小题10:__(时间) in Beijing.

在平衡跑道条件下起飞，（）

A、从起飞加速到V1的距离，等于从V1停下来的距离

B、起飞性能最好

C、加速到V1之前1秒一台发动机失效，使飞机停下来的距离，等于继续起飞到高度35ft，速度达到V2的距离

D、起飞距离与着陆距离相等