人在屈肘时，肱二头肌和肱三头肌的状态应该是[ ] A．肱二头肌收缩，肱三头肌舒张

道路运输经营者运输货物时，装载量＿。

A.只需满足车辆标记核载范围

B.只需满足公路的载重量

C.只需满足公路和桥涵载重量范围

D.需同时满足车辆、公路和桥涵载重量范围

男性，35岁，发热伴牙龈肿胀、出血，皮肤有多个结节性红斑；骨髓中异常细胞88%，胞核呈笔架形、马蹄形、S形等，并有折叠、扭曲、凹陷；特异性酯酶染色阴性，非特异性酯酶染色阳性可被NaF抑制。可考虑下列哪种疾病 （）

A.M1型白血病

B.M2型白血病

C.M3型白血病

D.M4型白血病

E.M5型白血病

One day, when I was a freshman in high school, I saw Kyle from my class walking home from school. It looked like he was carrying all of his books. I thought to myself, "Why would anyone bring home all his books on a Friday? He must really be a nerd (a foolish person)." I had quite a weekend planned, so I shrugged my shoulders and went on.

As I was walking, I saw a bunch of kids running towards him. They knocked all his books out of his arms and tripped(绊倒) him so he landed in the dirt. His glasses went flying, and I saw them land in the glass about ten feet from him. He looked up and I saw this terrible sadness in his eyes. So, I jogged over to him and as he crawled around looking for his glasses, I saw a tear in his eye.

As I handed him his glasses, I said, "Those guys are jerks. They really should go to hell." He looked at me and said, "Hey, thanks!" There was a big smile on his face. It was one of those smiles that showed real thankfulness. I asked him where he lived. As it turned out, he lived near me.

Over the next four years, Kyle and I became best friends. I teased him all the time about being a nerd. He had to prepare a speech for graduation. As he started his speech, he cleared his throat, and began. "Graduation is a time to thank those who helped you make it through those tough years. I am here to tell you a story."

I just looked at my friend with disbelief as he told the story of the first day we met. He had planned to kill himself over the weekend. He talked of how he had cleaned out his locker so his Mom wouldn't have to do it later and was carrying his stuff home. He looked hard at me and gave me a little smile. "Thankfully, I was saved. My friend saved me from doing the unspeakable."

I heard the gasp(倒吸气) go through the crowd as this handsome, popular boy told us all about his weakest moment. I saw his Mom and Dad looking at me and smiling that same grateful smile. Not until that moment did I realize its depth.

小题1:Why did Kyle carry all his books home?

A．Because it was Friday.

B．Because he was a nerd.

C．Because he wanted to kill himself.

D．Because he liked doing things for his mother.小题2:Which of the statements is TRUE according to the passage?

A．The bunch of kids attacked Kyle to have his glasses and books.

B．The author planned to study all weekend after he met Kyle.

C．The author was a freshman when Kyle gave the speech.

D．Kyle felt grateful to the author for his help.小题3:What can we infer from the passage?

A．When Kyle couldn't find the glass, he turned to the author for help.

B．The author teased Kyle a lot about being a nerd.

C．The author didn't expect Kyle to tell the story.

D．Kyle thanked his parents first for saving his life.小题4:What does the underlined "them" in the 2nd paragraph refer to?

A．The kids.

B．Kyle's books.

C．Kyle's glasses.

D．Kyle's arms.

现代高炉对原料供应系统的要求？

Ca、Si可与氧发生（）。