增加药物与TMPS酶结合，使抗癌效果增强的是（）.A．磺胺类药+甲氧苄啶  B．棒酸

主动脉瓣狭窄的收缩期杂音（）

A.一贯型

B.递增递减型

C.递增型

D.连续型

E.递减型

在测定小灯泡电功率的实验中：

（1）电源电压要______小灯泡的额定电压，串联一个滑动变阻器是为了______；

（2）闭合开关前，滑动变阻器应放在______位置上，这样做的好处是______；

（3）为了测定有“4.5V”字样的小灯泡的功率，除了要用电压表、电流表、小灯泡、开关、滑动变阻器、导线外，还应在下列器材中选用______．

A．三节干电池；  B．三节蓄电池；   C．两节干电池；   D．两节蓄电池．

近年来常有有关音乐、噪音对动植物生长发育影响的报道，请你依据所给材料和用具设计一个实验，以探究声音对豌豆种子萌发的影响。

材料和用具：数量充足的铺有滤纸的培养皿、无菌水、表面消毒的豌豆种子、分贝计(能测声音大小的仪器)、若干台收录机、《蓝色多瑙河》磁带、从磨具车间录制的磁带等。

(1)方法步骤：

①．_________________________________________________________；

②．_________________________________________________________。

(2)可能的实验结果及相应的结论：

①．_________________________________________________________；

②．_________________________________________________________；

③．_________________________________________________________。

　For more than twenty years scientists have been searching for signs of life on other planets. Most of these searches have been done over the radio. The hope is that someone in outer space may be trying to get in touch with us. Scientists also have sent radio and television messages on spaceships traveling through space, on the chance that someone may be receptive to such messages.

　　Scientists are using powerful radio telescopes to listen to signals from about 1, 000 stars, all within 100 light years of earth. In addition, they will scan（扫视）the entire sky to “listen” for radio messages from more distant stars. Using a computer, they will be able to monitor more than eight channels at one time. Scientists are looking for any signal they stands out from the background noise.

　　Of the 200 billion stars in the Milky Way galaxy（银河星系）, scientists find that five percent are like our sun. Perhaps half of them have a planet like earth. Such a planet would be a reasonable distance from the star for temperatures to be right for the evolution（进化）of life. Based on the inhabitable（that can be lived in）planets in our galaxy, most scientists agree that chances are likely that one or more of these planets support some life.

　　However, many scientists wonder whether intelligent（有智力的）life exists on other planets. Some believe that twenty years of searching without any intelligible messages shows that no one is out there. They say that the evolution of intelligence comparable to ours is unlikely.

　　Other scientists believe that our search hasn’t been long enough to rule out the possibility that intelligent life exists in our galaxy. Although our sun family is only about five billion years old, our galaxy is about 20 billion years old. In that time, some scientists think it is likely that civilization（文明）much more advanced than ours have developed. Perhaps these civilizations send us no signals; perhaps we have not recognized the signals they have sent us. If we hope to find intelligent life, these scientists believe that we have to keep looking.

小题1:According to the passage, how many planets in our galaxy might be inhabitable?

A．5 billion．

B．10 billion.

C．15 billion.

D．200 billion小题2:The first paragraph in this passage is mainly about ________ .

A．how scientists are looking for signs of life on other planets

B．why scientists are looking for signs of life on other planets

C．where scientists are looking for signs of life on other planets

D．when scientists are looking for signs of life on other planets小题3:The underlined word “monitor” in the passage means“ ________ ”.

A．find

B．follow

C．check

D．form小题4:Which of these statements is true based on the information in the passage?

A．The earth is one of the oldest planets in our galaxy.

B．Most scientists believe that there is intelligent life on other planets.

C．Scientists are trying different ways to find signs of life on other planets.

D．Scientists don’t believe that there might be life on other planets.

既治亡阳证，又治阳虚外感风寒的药物是（）

A．附子

B．干姜

C．肉桂

D．吴茱萸

E．小茴香