YB25包装机封签负压吸风过低会导致封签取纸不畅。
参考答案：对
同义句转换。
1. The sea air will benefit you.
You win ____ the sea air.
2. The new highway will be of great benefit to the village people.
The new highway will ____ the village people.
YBT250频谱仪，其清频测试的显示模式包括（）
A.spectrum
B.spectrogrum
C.sweep
