咳脓臭痰常提示病人呼吸道有（）A、病毒感染B、真菌感染C、化脓菌感染D、铜绿假单胞菌

不符合溶贫骨髓象特征的是（）

A.骨髓增生明显活跃

B.粒红比值减低

C.三系显著减低

D.无巨幼红细胞

E.以上都是

下列经济法的渊源中，其法律效力仅次于宪法和法律的是( )。

A．行政法规和地方性法规

B．部门规章

C．单行条例

D．民族自治条例

在化学反应中，参加化学反应的各物质的总质量与生成物的总质量是否会发生改变？同学们进行了探究．四个小组各做了一个实验．

（1）第一组用实验测定的数据有：木炭和容器的总质量mg，其燃烧后灰烬和容器的总质量ng．m和n 关系为：m______n（填“＜”“＞”“=”）

（2）第二组用实验测定的数据有：光亮的铁钉质量为xg，其生锈后的质量为yg．x和y的关系为：x______y．

通过对上述两个实验的分析，你认为用有气体参加或生成的化学反应来验证质量守恒定律时，应______，才能判定参加化学反应的反应物总质量和生成物的总质量是否相等．

（3）第三组作了如下实验：（装置如图）锥形 瓶内插有一根上端系有一小气球，下端能与白磷

接触的玻璃管．引燃白磷，气球胀大待锥形瓶冷却至室温后，气球部分缩进玻璃管内，气球缩进的原因是______．将

锥形瓶放在托盘天平上称量，天平仍平衡，这说明：______．

完形填空（共15题，每小题1分，满分15分）

阅读下面短文，掌握大意，然后从短文后各题所给的四个选项（A、B、C和D）中，选出最佳答案，并在答题卡上将该项涂黑。

A long time ago, in a small house in Scotland, two friends lived together. Their names were John and Bobby.

John and Bobby were not  16   , and they had few things except friends,    17    they were happy. They lit a warm fire when it was cold outside. They had food to eat when they were hungry. They were  never     18     because they had each other.

John and Bobby     19     to take long walks together. After their     20     John usually cooked the dinner. John and Bobby ate the dinner and then     21    in front of the fire. They had a(n)     22     but happy life.

Then John developed a(n)     23     disease and died in the spring of 1858. He was  24     in a grave (坟墓). After that, Bobby stood at John’s grave and shouted. “Come on, Bobby,” John’s     25     said. “It’s time to go home.” Bobby went home, but later he returned to the grave. He     26     near it. He stayed there all night.

Bobby stayed at the grave site the next day, and the day after another. For the next 14 years, Bobby never left the    27    . When the weather was cold, he slept in a small house near the grave. When it was     28    , he slept on the ground near John’s grave.

29    , in 1872, Bobby died, too. John’s friends buried him in a     30     grave near John’s. Why was Bobby’s grave so little? Bobby, John’s best friend, was a dog.

16. A. rich                  B. lucky          C. beautiful      D. funny 

17. A. and               B. or         C. but             D. so

18. A. lonely           B. alone         C. worried                D. separate

19. A. failed   B. competed  C. imagined         D. liked

20. A. work           B. rest     C. run                 D. walk

21. A. sang                B. talked          C. sat    D. studied

22. A. hard                 B. sad          C. easy         D. simple

23. A. serious  B. unhealthy   C. big     D. sick

24. A. put                   B. escaped       C. stored         D. buried

25. A. friends B. children  C. parents   D. brothers

26. A. got up    B. turned down         C. sat down D. put up

27. A. garage   B. grave         C. home          D. town

28. A. cool                  B. warm        C. wet                D. rainy

29. A. Luckily    B. Quickly        C. Finally   D. Interestingly

30. A. large     B. small    C. firm     D. weak

当禾谷类作物群体增大的时候（）。

A、密度下降，总穗数下降

B、密度增高，总穗数下降

C、穗粒数和粒重呈下降趋势

D、穗粒数和粒重增加