已知a,b是实数,且3a+4+b2-6b+9=0,则ab=______.

题型:填空题

问题:

已知a,b是实数,且
3a+4
+b2-6b+9=0,则ab=______.
考点:算术平方根
题型:填空题

下列物质中富含维生素C的是 [ ]

A.淀粉      

B.鸡蛋          

C.可乐      

D.西柚

题型:填空题

根据对话内容,补全对话,使其完整﹑通顺。每空一词。

A: we have many rules at school.

B: (1)             do we. For example, we have to (2)             school uniforms every school day.

A: We usually do, too. We are not allowed to play soccer at school because we don't have a soccer field.

B: Oh, we are lukier than you. We have a big soccer field but we can only (3)             it in P.E.

A: Our teachers are very (4)             to us but sometimes they are strict. I think it's good for us.

B: I (5)             with you. I'll miss them when I graduate.

题型:填空题
I had a job interview this morning at 10:30 in a place which was quite far from my house.
I had asked my brother to_   ___me at the bus stop. But he was running late and it was already 9:45 before I reached the bus stop.__   __, I caught my first bus and had to wait at another stop for the second one.
Then, in front of my__   __, a little girl (who may have been a beggar) was hit by a car!The car drove off without__   __. The girl was badly hurt in her hands and legs. She was _   ____heavily and was screaming in pain. After a few seconds she fainted(昏厥).
People standing nearby didn’t seem to know_   ___ to do. I ran over and called for an auto. A_   ____, who seemed to be the girl’s grandpa, ran towards us with _  ____steaming down his cheeks. I took them both to ______ in the auto. They admitted the girl and _   ___ to start her treatment. Happily, she was well__   ___ and soon came back to consciousness. She smiled at me and hugged her grandpa. I _   ____ the bill, gave them a little money, then I __   ___ for my interview.
It was 1:30p.m. Before I got home. I was __   __hours late! The one interview who was still there asked what had__   __ me. I told him, and then gave him one of our Smile cards and _   ____ about the project. He was very impressed!
It would be __   ___ to say I got the job.      ___, because I was so late he could not pass me on to the next level.
Getting the job might have made me happy, but helping that young girl and her grandpa made me even __   ____! I really thank God for giving me that__   ___ to help.
小题1:
A.dropB.sendC.takeD.deliver
小题2:
A.ActuallyB.LuckilyC.SurprisinglyD.Gradually
小题3:
A.busB.seatC.eyes D.feet
小题4:
A.noticingB.speedingC.knockingD.stopping
小题5:
A.cryingB.bleedingC.sleepingD.trembling
小题6:
A.howB.whereC.whoD.what
小题7:
A.beggarB.driver C.policemanD.gentleman
小题8:
A.wordsB.sweatC.tearsD.blood
小题9:
A.homeB.interviewC.busD.hospital
小题10:
A.preparedB.intendedC.rushedD.promised
小题11:
A.cared aboutB.looked afterC.dealt withD.carried out
小题12:
A.boughtB.acceptedC.paid D.donated
小题13:
A.set aboutB.set off C.set outD.set up
小题14:
A.twoB.threeC.fourD.five
小题15:
A.delayedB.happenedC.hitD.terrified
小题16:
A.complainedB.explainedC.debated D.introduced
小题17:
A.niceB.shamefulC.hopelessD.unbelievable
小题18:
A.andB.soC.butD.or
小题19:
A.prouderB.greaterC.happierD.harder
小题20:
A.courageB.opportunityC.positionD.situation
题型:填空题

下图为眼球结构模式图

(1)外界物体反射来的光线进入眼球后,经[ ]          和玻璃体的折射作用,在[ ]         上形成清晰的物像。

(2)物像刺激了h上的          细胞,  这些细胞产生了大量的           ,经[ ]              传递到大脑皮层,形成          

(3)近视眼患者主要是由于不注意用眼卫生,如                      会造成图中b的曲度过大,或前后径过长而引起的。

题型:填空题

疾病发生的重要条件是()

A.情绪

B.正气

C.邪气

D.饮食习惯

E.生活环境

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