调节阀的公称直径必须与管道的直径相同。
参考答案：错
_____ reduce pollution, the government has made a policy to restrict the use of plastic bags in some areas.[ ]
A. In order to
B. So as to
C. So that
D. In order that
客户号或有账号查询的交易码是（）
A、60450
B、60480
C、60460
D、60470
