复合材料性能上的特点。
参考答案：
1、材料具有可设计性2、比强度高及比刚度大3、抗疲劳性能好4、高温性能好5、制造工艺简单6、结构可实现功能智能化。
句型转换。
1. We went to the mountains on Saturday morning. (改为一般疑问句)
________ you ________ to the mountains on Saturday morning?
2. Annie studied for the math test last night. (对画线部分提问)
________ ________ Annie ________ last night?
3. I had a busy weekend. (对画线部分提问)
________ ________ your weekend?
4. Frank played computer games just now (刚才). (改为否定句)
Frank ________ ________ computer games just now.
5. What did you do over the weekend? (改为同义句)
________ did you ________ your weekend?
班级目标管理
