什么是内部机动和外部机动?

快乐选择。

1．小男孩摆弄了很久很久，说：“一切准备停当。”这说明[ ]

A．小男孩为能给高尔基拍照而十分高兴，要作好充分准备，一定要拍好照片。

B．因为要给高尔基拍照，小男孩很紧张，忘了怎么用相机了。

2．当孩子把“胶卷忘在家里了”的事告诉高尔基后，高尔基赶紧站起来，这个“赶紧”表明[ ]

A．高尔基想让孩子给他拍一张照片。

B．高尔基对孩子的疼爱和关切之情。

阅读理解

     "Hey, Jenna, do you think we'll still be friends when we're eighty-two?" I asked my friend. It was clear

that she was wondering where I had come up with such a question. Losing Jenna would be like losing a

very close sister. We hung out together. We gave each other advice.

     "Of course, we'll still be friends when we're eighty-two." Jenna announced loudly.

     The next year, in the fourth grade, we met Jamie. The three of us soon became close friends. We

played together almost every day. I thought even time couldn't pull us apart, but I was sadly mistaken.

     The three of us started fighting a lot. Before Christmas, we had a really big fight, and Jamie and

Jenna were against me, both saying I was bossy. I felt helpless and lonely. I thought Christmas would

be horrible!

     I was surprised when Jenna came to my house and gave me an awesome Christmas card she had

made for me. I was so sure that she was still disappointed with me.

     "Wow, " I said, breaking the silence as we stood on either side of my front door. "Thanks."

     "Okay…well…I have to go," she said softly.

     " Okay. See you later then…"and I closed the door.

     "Who was that at the door?" my mum asked.

     The card started off with "Merry Christmas", but then it said, "I am so glad we're friends. I am sorry

about what I said when we were fighting. A fight won't stop us from being friends. Besides, we said we

were going to be friends even when we're eight-two."

      I stopped reading and started laughing. I couldn't believe I had forgotten what she said that day in

her back yard. I couldn't believe I had been so selfish in trying to get even and making my friends feel

sorry for me that I had forgotten about real friendship.

1. How would the author and Jenna get along with each other after Christmas?

A. They would be close friends again.

B. They would not speak to each other.

C. They would lose touch with each other.

D. They would go on fighting with each other.

2.The underlined sentence "I was bossy" in the fourth paragraph means "_________".

A. I looked like a boss

B. I acted as a boss

C. I was fond of giving orders

D. I was fond of fighting

3.Which of the following is the right time order according to the passage?

a. Jamie became our friend.

b. I felt lonely and unhappy.

c. Jenna, Jamie and I fought a lot.

d. Jenna brought me a Christmas card.

e. I was sorry for what I did to her.

f. Jenna and I promised to be lifelong friends.

A. f a b c e d      

B. a c f b d e        

C. a b c f e d        

D. f a c b d e

4.The author was delighted when she read the card from Jenna because _________.

A. what Jenna wrote was funny

B. Jenna would be her friend again

C. she was happy about the coming Christmas

D. she was happy to receive a Christmas card

听觉信号鸣示音响长声为（）s。

A、1

B、2

C、3

D、5

若原子的某内层电子被电离形成空位，其它层的电子跃迁到该空位上时，会将多余的能量以电磁辐射的形式释放出来，此电磁辐射就是原子的特征X射线．内层空位的产生有多种机制，其中的一种称为内转换，即原子中处于激发态的核跃迁回基态时，将跃迁时释放的能量交给某一内层电子，使此内层电子电离而形成空位(被电离的电子称为内转换电子)．²¹⁴Po的原子核从某一激发态回到基态时，可将能量E₀=1.416MeV交给内层电子(如K、L、M层电子，K、L、M标记原子中最靠近核的三个电子层)使其电离．实验测得从²¹⁴Po原子的K,L、M层电离出的电子的动能分别为E_k=1.323MeV、E_L=1.399MeV、E_M=1.412MeV．则可能发射的特征X射线的能量为

A．0.013MeV

B．0.017MeV

C．0.076MeV

D．0.093MeV

酸枣仁具有下列何项作用（）

A.养心安神

B.宁心安神

C.益智安神

D.重镇安神

E.清心安神