英语

ACBDA ABAAC BDCDC DBBBA DBCDA

CDCAA ADDCD BDACC

1. 足球迷们围住他，请求他的签名。
2. 经过不懈努力，科学家们终于找到了治愈这种疾病的方法。
3. 很难想象生活在一个没有汽车的地方。
4. In order to make progress in the countryside, we set off early.
5. 我叔叔的工厂急需更多熟练工人。
6. If you want her to come, please inform her in advance.
7. It is said that he has already gone to Australia.
8. 我们试图让他们同意，但没有成功
9. 公司的利润比去年低了15%，这真是令人惊讶
10. There are always many strange ideas in his mind.

In the technicolor tapestry of modern life, my favorite electronic product is the smartphone. This compact device, no larger than a deck of cards, is a powerhouse of connectivity. I treasure it for its versatility and how it simplifies my daily routine. Firstly, it is the hub of my communication, connecting me with family and friends across the globe through calls, texts, and social media. The ease with which I can share moments and memories is unparalleled.

Secondly, it serves as a portal to the boundless knowledge of the internet. Be it for academic research or satisfying a sudden curiosity, my smartphone is my steadfast companion, offering information at my fingertips. In essence, it is not just a gadget but an extension of myself, facilitating my learning, entertainment, and personal growth. The smartphone, in its sleek embodiment, is a testament to the marvels of modern technology that I deeply appreciate.

数学

CCDBA CCBBD ADCDA BABBB

二

1

2 (1)

(2)

$$ E(X)=3×\frac{1}{10}+4×\frac{3}{10}+5×\frac{3}{5}=4.5 $$ $$ D(X)=\frac{1}{10}×(3-4.5)^2+\frac{3}{10}×(4-4.5)^2+\frac{3}{5}×(5-4.5)^2=9/20 $$