生活中的很多现象可以用学过的物理知识加以解释,下列解释错误的是( ) A.“下雪

题型:选择题

问题:

生活中的很多现象可以用学过的物理知识加以解释,下列解释错误的是(  )

A.“下雪不冷,化雪冷”,这是因为雪在熔化时吸热

B.游泳后,刚从水中出来时,感觉比较冷,这是因为人体皮肤上的水蒸发带走热量

C.寒冷的冬天,窗玻璃上出现冰花,这是一种凝固现象

D.从冰箱中刚取出被冷冻的雪糕,雪糕周围有“白气”,这是水蒸气遇冷液化而形成的小水珠

考点:熔化的规律及其特点汽化及汽化的特点液化现象、方法及其应用升华的定义及特点升华现象
题型:选择题
—Can you spell the word "key", please?
—_____.

A. I'm fine
B. I'm OK
C. Yes, K-E-Y.
题型:选择题

处理循环超负荷时,下列哪项是错误的()

A.立即停止输血

B.面罩吸氧

C.病人平卧,头侧一边,防止血性泡沫痰误吸

D.使用强心、利尿剂,去除过多的体液

E.四肢扎止血带

题型:选择题
Once my mother told me a story that in Africa, when an antelope (羚羊) wakes up every morning, the first thing it thinks about is, “I must be 36 to run faster than the fastest lion, or I will be killed.” 37 , a lion wakes from his dream. The first thing the lion thinks about is, “I must be able to catch the 38 antelope, or I will starve to 39 .” So almost simultaneously(同时地), the antelope and the lion get up and start running toward the 40 sun.
This is 41 : full of chances and challenges. Whether you are an antelope or a lion, you must go 42 when the sun rises. For students, it is just the same. If we don’t study hard, sooner or later, we will 43 the other students. At first I didn’t know what the word “exam” 44 . Later, I knew an exam was a kind of 45 . In competitions, there are always winners and 46 . As I grew up, I got to know competition well. In one’s life, there must be competitions, so people can 47 .
Each time I saw children playing games and heard their 48 , I wished I were that age again.  49 , I remembered my parents’ words: You must work very hard for a good future. So I 50 my pen and began to study hard again.
I was still not sure what competition 51 meant. One day, I was 52_in an English-speaking competition. When I went to the stage, I saw other students looking at me kindly. Suddenly I 53 what competition was. It is not as cruel as my teacher and parents told me. In fact, competition is the 54 : it is kind and necessary.
I learned a lot from realizing this 55 . Now I understand better about the world. Competition is important for us all.
小题1:
A.ableB.willingC.readyD.eager
小题2:
A.On the contraryB.At the same timeC.In other wordsD.In the first place
小题3:
A.fastestB.weakestC.slowestD.strongest
小题4:
A.deathB.survivalC.diseaseD.suffering
小题5:
A.sinkingB.settingC.shiningD.rising
小题6:
A.ruleB.lifeC.studyD.exam
小题7:
A.overB.throughC.aheadD.beyond
小题8:
A.fall behindB.pass byC.catch upD.hold back
小题9:
A.feltB.meantC.referredD.doubted
小题10:
A.victoryB.defeatC.processD.competition
小题11:
A.competitorB.playersC.losersD.failures
小题12:
A.improveB.concludeC.acquireD.handle
小题13:
A.cryingB.laughterC.whisperD.delight
小题14:
A.HoweverB.ThereforeC.BesidesD.Otherwise
小题15:
A.put upB.brought upC.made upD.picked up
小题16:
A.commonlyB.simplyC.obviouslyD.really
小题17:
A.succeedingB.participatingC.takingD.getting
小题18:
A.doubtedB.acknowledgedC.knewD.admitted
小题19:
A.toughB.importantC.contentD.opposite
小题20:
A.experienceB.knowledgeC.factD.consequence
题型:选择题

“谁敢横刀立马,唯我彭大 * * ”指的是下列哪次战争中的主要军事领导人

A.抗日战争的胜利

B.解放战争的胜利

C.抗美援朝的胜利

D.渡江战役的胜利

题型:选择题

连续流动式自动生化分析仪去蛋白是利用

A.加热器
B.去蛋白剂
C.气泡
D.透析器
E.吸附剂

更多题库