在化学反应前后，物质所含元素化合价发生变化的反应是氧化还原反应。它与九年级所学的

毒蛇咬伤，局部伤口红肿较重，创口剧痛，或有水疱、血疱、瘀斑、瘀点或伤处溃烂，头晕头痛，寒战发热，胸闷心悸，严重者烦躁抽搐，舌质红，苔黄，脉弦数。内治法则宜选用（）

A.活血通络

B.凉血熄风

C.清热解毒

D.祛风解毒

E.活血止痛

成形性

补全对话。

A: Hello. 1. __________________ .Dad?

B: Me, too.

A: But you look worried.  2. __________________?

B: I got a "C" in the English exam.

A:3. __________________

B: I think English is too difficult for me. I don't understand why we Chinese students have to learn it.

A: You know, 4. __________________.

B: You're right.  Though it's very useful, it's too hard.

A: It's hard, but it's important.  5. __________________

B: Really? It's very kind of you.  I'll try harder.

1. _________2. _________ 3. _________4. _________5. _________

在钢轨喷焊过程中（）可能产生回火。

A.乙炔压力波动小

B.供气过足

C.喷嘴过热

D.喷嘴过冷

宜研末冲服的药物是（）。

A.鹿角霜

B.珍珠

C.钩藤

D.灶心土

E.龙骨