斜纹变化组织的变化方法主要采用延长组织点、（）、改变飞数、增加斜纹条数或兼用几种变化方法等。
参考答案：改变斜纹方向
根据实际情况回答问题。
1. How do you spend your weekends?
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2. What do you often do on Saturday evening?
3. Do you have an e-mail address? What is it?
4. What time do you get up?
5. What do you like eating for breakfast?
下列化学方程式书写正确的是
A．Cu+ H2SO4 = CuSO4+ H2↑
B．Na2CO3 + H2SO4=Na2SO4+H2O+ CO2↑
C．CuO + CO =" Cu" + CO2
D．2S + 3O2点燃 2SO3
