"三废"综合利用产品价值是指利用"三废"作为主要原料生产的产品价值，包括留作生产自用的产品产值。（）
参考答案：错
A．，正电荷
B．，正电荷
C．，负电荷
D．，负电荷
Which one of the following nursing interventions should be included in a plan of care for a client with a T tube()
A. Maintain client in a supine position while T tube is in place.
B. Keep T tube clamped except for during mealtimes.
C. Inspect skin around the T tube daily for irritation.
D. Irrigate the T tube every 4 hours to maintain patency.
，正电荷
，正电荷
，负电荷
，负电荷