连锁店使用对讲机用于内部联络，应符合当地（）规定。
A.政府部门
B.行业协会
C.设备供应商
参考答案：A
下列各物质中，属于合成材料的是（ ）
A．陶瓷
B．铝合金
C．聚乙烯塑料
D．棉花
句型转换。
1. She can speak Chinese. (改为一般疑问句)
__________ Chinese?
2. She is eating an ice cream. (改为否定句)
She __________ an ice cream.
3. She has supper at home. (改为一般疑问句)
__________ supper at home?
4. Tom is writing to his friends. (对画线部分提问)
Who __________?
5. Please send me a postcard. (改为同义句)
Please send a postcard __________.
