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问题 选择题

下列有关人体体温调节的叙述，错误的是[ ]

A．寒冷环境刺激可使肾上腺素分泌增加，机体产热增加

B．寒冷环境刺激可使皮肤血管收缩，机体散热减少

C．炎热环境刺激可使甲状腺分泌激素增加，机体散热增加

D．极端炎热环境中，人体不能只靠神经和体液调节来维持体温恒定

答案

答案：C

问答题 简答题

对于高效液相色谱仪的检测器，除了须具备与气相色谱仪相同的基本要求外，还要特别注意哪两点？为什么？
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填空题

词汇运用

1. He often spends lots of time _____ with his friends online. (chat)

2. Good _____ with your trip to Hongkong. (luck)

3. In my family everyone has _____ own computer. (they)

4. I sometimes go to school without _____ breakfast. (have)

5. I can't hear you _____ , can you say it again?(well)

6. My brother and I are in different _____ (年级)

7. There're four _____ teachers in our class. (百)

8. The toilet is _____ the teachers' office and our classroom. (在......之间)

9. You can ask the _____ over there, maybe they know the way to the hospital.(警察)

10. It's hard for the little boy to _____  herself. (穿衣服)
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