如图所示是用光照射某种金属时逸出的光电子的最大初动能随入射光频率的变化图线,(直

题型:选择题

问题:

如图所示是用光照射某种金属时逸出的光电子的最大初动能随入射光频率的变化图线,(直线与横轴的交点坐标4.27,与纵轴交点坐标0.5).由图可知以下说法正确的是(  )

A.该金属的截止频率为4.27×1014Hz

B.该金属的截止频率为5.5×1014Hz

C.该图线的斜率表示普朗克常量

D.该金属的逸出功为0.5eV

考点:光的偏振
题型:选择题

男性,69岁。因刺激性咳嗽、痰血2周就诊。体检无阳性体征。送痰检找到鳞癌细胞。后前位常规胸片未见异常。

【假设信息】如果经现有检查仍不能发现肿瘤部位,其处理应采取()

A.剖胸探查

B.全身化学治疗

C.全身PET检查

D.定期(每隔1~2个月)随访CT

E.定期(每隔1~2个月)随访MRI

题型:选择题

服务工作中,接电话时()的语气会给对方留下良好的印象。

A、小声温柔

B、亲切大方

C、高亢洪亮

D、方式、语言都无所谓

题型:选择题

根据以下资料,回答106-110题。
据统计,2006年5月份全国基本型乘用车产销21.19万辆和22.13万辆,比2005年同期分别增长1.86%和26.03%;运动型多用途乘用车产销1.43万辆和1.52万辆,降幅不大;交叉型乘用车5月产销6.60万辆和6.85万辆,分别比上月下降14.23%和2.83%;多功能乘用车产销降幅最大,5月产销1.23万辆和1.24万辆。
2006年1至5月,基本型乘用车累计产销99.10万辆和96.93万辆,产量同比下降2.73%,销量同比增长1.07%;多功能乘用车累计产销6.11万辆和5.71万辆,同比增长31.26%和31.54%;运动型多用途乘用车累计产销6.46万辆和6.54万辆,同比下降16.00%和10.25%;交叉型乘用车累计产销36.77万辆和37.41万辆,同比增长6.02%和 10.29%。

根据上述材料,以下表述准确的一项是( )。

A.与上一年相比,全国2006年1至5月基本型乘用车产、销量都有不同程度的增长
B.2006年1至5月份全国运动型多用途乘用车产、销量都低于上年同期
C.2005年5月全国交叉型乘用车产、销量都低于2006年5月
D.2006年4月全国基本型乘用车产、销量都略高于5月

题型:选择题

风湿病皮肤病变表现为______和______。

题型:选择题

People who have lost the ability to understand or use words due to brain damage are called aphasics(失语症患者).Such patients can be extremely good at something else.From the changing expressions on speakers’ faces and the tones of their voices,they can tell lies from truths.

Doctors studying the human brain have given a number of examples of this amazing power of aphasics.Some have even compared this power to that of a dog with an ability to find out the drugs hidden in the baggage.

Recently,scientists carried out tests to see if all that was said about aphasics was true.THEY STUDIED A MIXED GROUP OF PEOPLE.Some were normal;others were aphasics.It was proved that the aphasics were far ahead of the normal people in recognizing false speeches—in most cases,the normal people were fooled by words,but the aphasics were not.

Some years ago,Dr.Oliver Sacks wrote in his book about his experiences with aphasics.He mentioned a particular case in a hospital.Some aphasics were watching the president giving a speech on TV.Since the president had been an actor earlier,making a good speech was no problem for him.He was trying to put his feelings into every word of his speech.

But his way of speaking had the opposite effect on the patients.They didn’t seem to believe him.Instead,they burst into laughter.The aphasics knew that the president did not mean a word of what he was saying.He was lying!

Many doctors see aphasics as people who are not completely normal because they lack the ability to understand words.However,according to Dr.Sacks,they are more gifted than normal people.Normal people may get carried away by words.Aphasics seem to understand human expressions better,though they cannot understand words.

小题1:What is so surprising about aphasics?

A.They can fool other people.

B.They can find out the hidden drugs.

C.They can understand language better.

D.They can tell whether people are lying.小题2:How did the scientists study aphasics?

A.By asking them to watch TV together.

B.By organizing them into acting groups.

C.By comparing them with normal people.

D.By giving them chances to speak on TV.小题3:What do we learn from this text?

A.What one says reflects how one feels.

B.Aphasics have richer feelings than others.

C.Normal people often tell lies in their speeches.

D.People poor at one thing can be good at another.

更多题库