在生产操作中应如何加料？

医学科研的根本目的是（）

A.揭示生命活动的本质和规律

B.认识疾病发生、发展过程

C.寻找诊治疾病的有效途径

D.探求增进健康的方法

E.维护和增进人类健康，造福人类

Michelle Obama made a daring decision to return to the same designer who created her Inaugural（就职）Ball dress four years ago --- and the risk paid off.

The First Lady looked extremely attractive in a red dress by designer Jason Wu. She teamed the dramatic dress with heels by Jimmy Choo and a diamond ring by Kimberly McDonald.

She surprised the fashion world by returning to a Wu design which had been made for her.

Four years ago at her first Inauguration Ball, Michelle shone in a white, one-shouldered floor-length dress by the designer.

Wu, who was 26 at the time and had only been working in fashion for three years, saw his career take off after the First Lady’s surprise decision to wear one of his dresses.

He said at the time that he was unaware she had chosen the dress and had been watching at home on his couch and eating pizza when she appeared.

After her 2013 decision, Wu told Women’s Wear Daily: “Mrs. Obama likes to keep her secrets. She fooled me again.”

Wu released a women’s clothing and accessories（配饰）collection at Target last year and continues to be popular with the First Lady for official appointments.

The sleeveless dress with low-cut back flattered （突出）49-year-old Michelle’s arms and neat waist.

It had been created especially for her by Wu and was a departure from the dark and plain color tone she stuck to at earlier inauguration events.

Vice-President Joe Biden’s wife Jill also looked attractive in a blue silk dress by Vera Wang at the Inauguration Ball.

小题1:What does the passage mainly talk about?

A．Mrs. Obama’s 2013 decision.

B．Wu, a great designer.

C．The First Lady’s secrets.

D．Michelle Obama’s inaugural ball dress.小题2: Michelle Obama’s brave decision proved to be a _________.

A．risk

B．success

C．surprise

D．danger小题3:Which of the following best describes Jason Wu?

A．Daring and gifted.

B．Unusual and cautious.

C．Talented and lucky.

D．Careful and brave.小题4:We can infer from the passage that _________.

A．Wu was aware that Mrs. Obama had chosen his work again

B．Being First Lady, Mrs. Obama hasn’t stuck to her dark and plain color tone.

C．Mrs. Obama told Wu to give away her secrets

D．Mrs. Obama should have told Wu the truth

关于化生的表述，下列正确的是

A．上皮组织细胞可以化生为间叶细胞

B．是一种已分化成熟的组织转化为另一种性质相似的分化成熟的组织

C．仅仅发生于上皮细胞

D．化生对机体是有利的，很少有不利的方面

下列图形能反映看涨期权卖方收益状况的是（）。

A.A

B.B

C.C

D.D

E.E

在Windows命令窗口中输入（）命令，可见到图9-16所示的结果。

A．ipconfig/all

B．routeprint

C．tracert-d

D．nslookup