下图装置中哪些可以起到启普发生器相同的效果（ ） A．①④ B．③④ C．②④

根据句意填单词，首字母已给出。

1. We should brush our t______ every day.

2. If you have a toothache, you must go to see a d______.

3. I'm very t______, I want to drink some water .

4. I have an i______ meeting. I must go now.

5. —Peter. What's the m______ with you?

    —I'm very tired .

6. His temperature is very high. He has a f______.

7. You have a sore throat. You should drink some hot tea with h______.

8. We should try our best to keep the b______ of nature.

9. He is very tired at the m ______. He is sleeping now.

10. —What's wrong with you, Marry?

    —I have a bad s ______.

晶体学中，3L4表示：（）

A.三个四次轴

B.四个三次轴

C.三个反映面

D.三个对称轴

电渣压力焊在冬期操作时应注意什么

临床上喉感觉神经性疾病的诊断要点是()

A．长期不适的喉部感觉异常病史

B．喉镜检查无明显异常发现

C．充分排除器质性病变

D．暗示治疗有效

E．动态喉镜观察异常

用友报表系统中，报表数据文件还能够被转换成的文件格式包括( )。

A．xls

B．mdb

C．txt

D．exe