6. by accident(=by chance, accidentally)偶然地,意外. without accident(=safely) 安全地,

He did it whether by accident or design.

5. access(to) (不可数名词) 能接近,进入,了解

Citizens may have free access to the library.

4. (be) abundant in(be rich in; be well supplied with) 富于,富有

As we know, China is abundant in natural resources.

3. absorb(=take up the attention of)吸引……的注意力(被动语态):be absorbed in 全神贯注于…… 近:be engrossed in ; be lost in ; be rapt in ;be concentrated on ; be focused on ; be centered on

The children were so absorbed in their game that they did not feel hungry.

2. absence of mind(=being absent-minded)　 心不在焉

Don’t be absent-minded at this very moment.

1. be absent from… 缺席，不在

Is anybody absent from class?

38．(10分)

(10分)⑴①④⑤ 　R基不同　　

⑵脱水缩合　2个　

⑶肽键　　 -CO-NH-

(4) C　　

(5) -CH₃　　　 -CH₂-CH₂-COOH　　　 4

37．(16分)

(1)( A )[⑧]细胞壁 [①]叶绿体[⑤]液泡

(2)纤维素、果胶　　 [②]高尔基体

(3)CO₂等物质和一定的环境条件(4)[①]叶绿体

(5)[④] 线粒体　 有氧呼吸

(6)①②④⑤⑥

(7)叶绿体和液泡

(8)[ ⑦ ]核糖体　

(9)( A)(10)4

36．(9分)(1)蛋白质、脂肪、糖类(碳水化合物)(3分)

(2)碘液　 蓝色　 苏丹Ⅲ(或苏丹Ⅳ)　

橘黄色(或红色)　双缩脲 　 蛋白质

21-30DABDD，BADCD　　　　 31-35ABBBC