人以0.5m/s的速度向竖直放置的平面镜走近，人在平面镜中像的大小______（

首字母填空。

1. I got lots of g______ on my birthday.

2. Would you like to p______ some milk into the glass?

3. He won the first prize in the singing c______.

4. You should keep c______ in front of danger.

5. P______ is one of the most important problems in the modern world.

6. I don't play sports every day,because I have less f______ time for myself.

7. There are many tall b______ in our city.

8. Who do you think will w______ the World Cup?

9. The girl likes playing the piano,because she wants to be a p______.

10. I got Liu Xiang's a______ in Beijing last year.

下列选项中，属于可以不登记物权即生效的情形是( )。

A．王某因接受遗赠取得其叔叔的房产

B．A房地产开发企业转让商品房

C．丙通过受让方式取得土地使用权

D．甲从乙处购置一幢房屋

某同学为了区别氢氧化钠溶液和澄清石灰水，设计了如图所示的四组实验方案，其中能达到目的的是      [ ]

　　　盐酸                                                        

A           

　　　酚酞   

B               

　　　石蕊

C              

　　　二氧化碳      

D

钢筋在混凝土中最小保护层厚度与混凝土强度等级有关，与钢筋强度等级无关。( )

杂质检验分两步进行，小样检验主要是检出并肩杂质。