可行性研究属于（）阶段的工作。A、计划 B、决策 C、实施 D、准备

阅读理解。

     Mrs. White, a fifty-four-year-old woman, lives in a small town. Her husband died several years ago. Her

son, Ron, works in an office in London. And her daughter lives in the same town with her, but she lives in her

husband's house. Only the old woman stayed in the old house by herself.

     One day Mrs. White received a letter from Ron. The young man missed her very much. He hoped she

would go to the capital soon. The woman was happy and decided to start the next morning. She took a bus

to the railway station and bought a ticket. Before she was going in, suddenly she remembered she had not

locked the gate of the house. As she forgot her daughter's telephone number, she hurried to the post office

and bought a stamp and an envelope (信封). In her letter she told her daughter to lock the gate right now.

then she put the envelope into the post box. At the entrance a man stopped her and said, "Your ticket, please."

Mrs. White had a look at her hand, and began to cry: she was holding the letter in her hand.

1. Ron missed his mother because ______. [ ]

A. he wanted her to look after him

B. she was too old to look after herself

C. he was afraid she would be ill at home

D. he thought she felt lonely at home

2. Mrs. White's husband has been dead ______. [ ]

A. before several years

B. for a few years

C. since last year

D. many years ago

3. Mrs. White decided to go to London ______. [ ]

A. by train

B. by bus

C. by plane

D. by ship

4. Mrs. White told her daughter to lock the gate because ______. [ ]

A. she was more careful than her

B. she knew where she lived

C. she only had a daughter

D. nobody else was to ready to help her

5. Mrs. White began to cry because ______. [ ]

A. the man didn't let her in

B. she had put the letter into the post box

C. she lost her letter

D. she had put the ticket in the envelope

患者女，36岁，低热，关节痛，气喘1月余，查体：面部可见蝶形红斑，口腔溃疡，左下肺未及呼吸音，胸片示左肺中等量积液，尿常规示蛋白（2+）、RBC（1+），血常规：Hb110g/L，WBC3.2×10⁹/L，PLT95×10⁹/L。

若经鉴别诊断为SLE后采用的治疗原则应排外（）

A.治疗应当个体化

B.急性活动期首选糖皮质激素

C.轻度者可用氯喹治疗

D.将自身抗体作为判断疗效的指标

E.积极对症治疗

科学管理的中心问题是降低生产成本。

为什么转炉冰铜吹炼不需燃料？

黑米黄酮（blackriceflavone）