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问题 单项选择题

下列几种生态系统中，自动调节能力最强的是（）。

A．冻原子

B．温带落叶林

C．沙漠

D．热带雨林

答案

参考答案：D

解析：

结构越复杂的生态系统，自动调节能力越强，它的抵抗力稳定性就越强。

单项选择题

One day while a girl was walking in the woods she found two starving songbirds. She took them home and put them in a small (16) She cared for them and felt great love for them.
Once the (17) and per of the two birds flew from the cage. Therefore, (18) he flew close, she grasped him (19) She felt glad, but suddenly she felt the bird go limp. She opened her hand and (20) in horror at the dead bird.
She noticed the other bird moving back and forth on the edge of the cage. She could feel his great need for (21) She lifted him from the cage and (22) him softly into the air. The bird circled once, twice, three times.
The girl watched delightedly at the bird’ s enjoyment. Her heart was no longer (23) with her loss. Suddenly the bird flew closer and (24) softly on her shoulder. It sang the sweetest melody that she had ever heard.
The fastest way to (25) love is to hold on it too tightly, while the best way to keep love is to give it WINGS!

Ⅱ. 完形填空

/Close
通过下面短文，掌握其大意，然后再各题所给的四个选项(A、B、C和D)中选出一个最佳选项。

A．cage

B．box

C．tank

D．room
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多项选择题

12岁女孩，因高热、寒战3天，行右臀部青霉素注射，但一周来仍持续高热，右髋部疼痛，不能站立行走，右下肢呈外旋位，右髋活动受限，右臀部肿胀，皮温增高，右髋前方有深压痛，X线检查(-)，初步诊断为右髋化脓性关节炎。

化脓性关节炎可导致

A．关节功能障碍

B．完全强直

C．形成假关节

D．骨骺受损

E．影响发育

F．化脓性骨髓炎

G．股骨头坏死
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