一个森林群落中不包括（） A.细菌和真菌 B.所有动物 C.微生物 D.枯叶和土壤

完型填空。

One Sunday morning, Millie and Amy went to Sunshine Park. They love to chat there. As usual, they sat    1   a big tree. Suddenly, they heard a whistle from the bushes behind the tree. They turned around but could not see anything unusual. They were   2  .      "Is   3   there?" Millie asked. Nobody answered. They   4   very carefully and heard the strange noise again. The two girls were very afraid. They ran away quickly. On their way, they met Andy.      "What happened?" Andy asked. "There's a ghost in the   5  . Please help us." Millie said. "Really? Tell me more." Andy said. Millie told Andy everything. Andy went to the park,   6   beside the tree and listened carefully. Then he heard   7   noise! He looked behind the tree and heard another whisper. He was now sure the sound    8   from the bushes. He searched carefully.      "Oh! Here it is." Andy said to himself. He   9   a little cat in the bushes. It was very weak. When it miaowed,  10  made a sound like a whisper.

( )1. A. under   ( )2. A. excited ( )3. A. nobody  ( )4. A. saw     ( )5. A. church  ( )6. A. rose    ( )7. A. a       ( )8. A. came    ( )9. A. smelled    ( )10. A. he     B. on         B. frightened B. everybody  B. looked     B. school     B. slept      B. the        B. learned          B. looked     B. she        C. behind         C. frightening    C. anybody        C. heard          C. garden         C. stood          C. an           C. heard          C. searched     C. it           D. in       D. exciting D. somebody              D. listened D. park     D. lay      D. other    D. fell     D. found    D. that

在“探究凸透镜成像规律”实验中。

（1）小红同学用光具座做凸透镜成像实验时，蜡烛的像成在了光屏上侧，为了使蜡烛的像能成在光屏中央，以下操作可达到目的的是(      )

A．将凸透镜往上移   B．将光屏往下移   C．将蜡烛往上移   D．将蜡烛往下移

（2）小红同学总结的三个实验结论如下表，其中正确的是(      )

A．实验1        B．实验2         C．实验3        D．实验2和实验3

实验 序号	物距/u	像的性质			像距/υ
		实虚	大小	正倒
1	u＞2f	实像	缩小	倒立	f＜υ＜2f
2	f＜u＜2f	实像	缩小	正立	υ＞2f
3	u＜f	虚像	放大	倒立	f＞υ＞2f

（3）在实验中，若用一张不透明的纸将透镜的上半部分遮掉，下列说法正确的是(  )

A．像也只剩下一半                     B．仍能成像，只是变暗一些

C．不可能成像                         D．仍能成像，只是像上有暗斑

（4）如图所示，调节蜡烛、凸透镜和光屏的位置，都能得到清晰的像，其中在光屏上成倒立、缩小实像的是图________，此规律在实际中的应用是________。

“原产国”栏应填( )。

A．中国

B．英国

C．印度

D．伦敦

建立健全惩治和预防腐败体系的主要任务是（）。

A、深化作风建设

B、落实责任制

C、坚决惩治腐败

D、科学有效预防腐败

E、实现巡视全覆盖

企业应对从事接触职业病危害因素的作业人员进行（）职业健康检查。

A.上岗前

B.在岗期间

C.离岗前和退休前

D.A、B和C