题目内容

Listen and fill. 听录音,填写表格。 Save Energy at Home1. Take showers rather than baths to ___________ water.2. Recycle ___________, metal and glass.3. Donate old ___________, toys, clothes and other things to charities.4. Turn off the ___________ when you leave the room.5. Use ___________ products.

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Listen and order. 听录音,排序。 A. Besides, we organised a green club.B. And we managed to find answers for them.C. Some students visited our website and asked some questions.D. My classmates and I created a website to publicise knowledge about environmental protection.E. We also invited our teachers to join us.F. We had activities, such as collecting waste paper around the campus, planting trees, etc.

下列叙述中哪项与维生素A不符

A、维生素A在体内被代谢为维生素A酸而排泄
B、维生素A 具有一定的预防和治疗癌症
C、维生素A 侧链上具有四个双链, 故现具有16 个顺反异构体
D、全反式维生素 A 的活性最强
E、本品对紫外线不稳定, 容易被空气中的氧化生成环氧化物

在体内须经羟基化后才有活性的维生素有

A、维生素 A
B、维生素 Bl
C、维生素 C
D、维生素 D3
E、维生素 K3

下列叙述中哪项与维生素D3 不符

A、在体内经肝、肾脏两次羟基化后才具有生理活性
B、稳定性低于维生素 D2
C、与维生素 D2 的区别在于没有 22 位双键及24位甲基
D、用于调节钙、磷代谢, 治疗佝偻病, 软骨病
E、又名胆骨化醇

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