正常成年人血液中化学物质（X）随时间变化的情况如图。在饥饿时，如果X是血糖，在a→b

Read and choose.（选择词语填空。注意英语句子的格式。）

what which when who why

1. —             do you do at 8:00 in the morning every day?

    — I do exercises.

2. —             does your's brother like winter?

    — Because he likes skating best.

3. —            is playing football on the playground now?

    — John with his friends .

4. —            season do you like best?

    — It's fall.

5. —             is your father's birthday?

    — It's in March.

在△ABC中，角A，B，C所对的边分别为a，b，c，λc=2acosB（λ∈R）．

（I）当λ=1时，求证：A=B；

（II）若B=60°，2b²=3ac，求λ的值．

HTML语言，符号清单

原发性肾小球疾病的病理分型中不包括（）

A.局灶节段性病变

B.轻微病变性肾小球肾炎

C.硬化性肾小球肾炎

D.新月体性肾小球肾炎

E.薄基底膜肾病

以下哪项处理不利于预防术后肺不张

A．增加术后运动与咳嗽

B．纤维支气管镜吸痰

C．术前2周停止吸烟

D．术前呼吸锻炼

E．术后腹部切口捆扎腹带