游走肾与异位肾的不同之处在于（）。 A.一侧肾区探查不到肾脏回声 B.它具有类似肾的

In time of serious accidents, ________ we know some basic things about first aid, we can save lives.

A．whether

B．until

C．if

D．unless

二氧化硅(SiO₂)又称硅石，是制备硅及其化合物的重要原料(如图)。下列说法

正确的是(   )

A．SiO₂属于两性氧化物

B．盛放Na₂CO₃溶液的试剂瓶不能用玻璃塞

C．硅胶吸水后不能重复再利用

D．图中所示的转化反应都是氧化还原反应

某同学的实验结果如图所示，其中A为固定橡皮条的图钉，O为橡皮条与绳套结点的位置．图中______是力F₁与F₂的合力的理论值，______是力F₁与F₂的合力的实验值．

How does a place become a World Heritage Site? It takes a lot of people to decide.

1）If a country wants one of its places to be on the World Heritage List, it has to ask UNESCO. The place must be important and special. UNESCO put the Great Wall on the list in 1987 because, it said, it was a great part of Chinese culture and beautifully made to go with the land．When a country asks, it must also make a plan for taking care of the place.

2）The World Heritage Committee of UNESCO talks about different places and decides whether to put them on the list. The committee meets every June. Many experts help the committee to decide.

3）After a new place goes on the list, UNESCO gives money to help keep it looking good．If a place is in serious danger, it may be put on the List of World Heritage Sites in Danger. UNESCO gives special care and help to those places.

4）Countries have to give UNESCO regular reports about places on the list. If UNESCO thinks a country isn’t taking good enough care of a place, the site will be taken off the list.

小题1:The passage implies that _____.

A．becoming a world heritage site takes hard work

B．a place with beautiful scenery is often on the World Heritage List

C．a place which was taken good care of is often on the World Heritage List

D．the Great Wall became a World Heritage Site for its long history.小题2:If a place successfully becomes a World Heritage Site, the country _____.

A．can ask UNESCO for more money and help

B．should continue to take special care of it

C．won’t take trouble of caring for it

D．will try to put it on the List of World Heritage Sites in Danger小题3:The passage mainly discusses ______.

A．how the World Heritage Committee of UNESCO decides a World Heritage Site

B．how the World Heritage Committee of UNESCO protects a World Heritage Site

C．how the Great Wall becomes a World Heritage Site

D．how a place becomes a World Heritage Site小题4:The purpose of putting a place on the World Heritage List is _____.

A．to attract more tourists from other countries

B．to get more money and help from other countries

C．to have it taken better care of

D．to make it known to other countries

一位正在接受糖皮质激素治疗的ITP患者，突然出现脑出血，下列紧急处理措施中不适当的是（）

A.血小板输注

B.静脉注射丙种球蛋白

C.血浆置换

D.大剂量甲泼尼龙静脉注射

E.氨肽素口服