广义的葡萄膜炎不包括( )A．葡萄膜的炎症 B．巩膜的炎症 C．视网膜炎症 D．视

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      You can see lots of kangaroos (袋鼠) in Australia, and not only in zoos but also outside the cities and towns.

You can see them everywhere. Kangaroos are very popular in Australia. They have very strong legs, so they are

very good at jumping. Their tails (尾巴) are very strong, too, so when they want to have a rest, they rest on

their tails. Kangaroos are also good at looking after their babies. Mother kangaroos keep their babies safe in their

pockets.

1. There are many kangaroos _____. [ ]

A. from Australia

B. in America

C. in Australia

D. from America

2. Where can we see kangaroos in Australia? [ ]

A. in cities.

B. in towns.

C. in parks.

D. everywhere.

3. Why are kangaroos very good at jumping? [ ]

A. because they are very healthy.

B. because they have strong tails.

C. because they have strong legs.

D. because they have big pockets.

4. How do kangaroos rest when they want to rest? [ ]

A. on their legs.

B. on their hands.

C. on their tails.

D. on their back.

5. What are kangaroos good at doing? [ ]

A. they are good at looking after their babies.

B. they are good at jumping.

C. they are good at resting on their tails.

D. A, B and C.

从三类产业的构成可以看出一个国家的经济发展水平，下列说法正确的是

A．一般来说，经济落后的国家第一产业比重小

B．现在世界上的发达国家大多数第一产业与第三产业比重大致相当

C．现在世界上的发展中国家大多数以第二、三产业为主

D．一般来说，随着经济的不断发展，第二、三产业的比重会逐渐增大

对方在某些问题上可以让步但却坚持不让步时，谈判难以继续下去，此时首选的谈判策略是（）

A．软硬兼施 

B．利用竞争 

C．最后通牒 

D．示弱求全

基本要求中，在应用安全层面的访问控制要求中，三级系统较二级系统增加的措施有哪些？

关于胎盘的功能，下列哪项是错误的

A．防御功能
B．产生羊水
C．合成激素和酶
D．排除胎儿代谢产物
E．胎儿营养物质的供应及母儿气体交换