Green economy offers a new model ________ people could both protect the climate and develop the economy, according to what Li said at the International Cooperative Conference on Green Economy and Climate Change.

A．how

B．why

C．where

D．which

齿轮泵开启对泵进行盘车操作正确的是（）

A、对泵盘车90度无卡阻就可启动泵

B、对泵盘车180度无卡阻就可启动泵

C、对泵盘车2~3周无卡阻就可启动泵

D、不用对泵盘车即可启动泵