常温条件下列溶液中离子浓度的等量关系正确的是（ ） A．0.1mol/L氨水中：

根据句意或首字母填空，每空一词。

1.  She e_______ twice a week.

2.  The old people do morning _______ every morning to keep healthy.

3.  The students in our school often do eye _______  after the third class.

4.  If you want to be thin, you should take more _______ and eat less meat.

5.  The students are tired because they do a lot of  e_______ today.

6.  My friend likes s _______.  He s_______ four times a week.

7.  Mrs  Green goes _______ once a week. She often buys a lot of expensive things for

    herself in the store.

8.  The boy hardly _______ plays sports,  so he is very fat.

9.   I like sports _______ on TV.  I often watch them.

10.  I shop t_______ a month because I am very busy.

陆地生态系统的主要类型有哪些？

建筑物中能迅速排除从屋檐下滴下的雨水，防止因水渗入地基而造成其下沉的构造设施是（）

A.勒脚

B.散水

C.明沟

D.窗台

E.踢脚

食物中毒的处理要点（）

A、想吐的话，应让其吐出，出现脱水症状要送医院。

B、用塑料袋留好呕吐物或大便，带着去医院检查，有助于诊断。

C、不要轻易地给病人服止泻药，以免贻误病情。

若某罐罐底水高度不到300mm，要测其罐底水高度简述操作方法？