To handle the financial crisis, the new government has to work more ______ with other nations, especially the less-affected ones.

A．formally

B．smoothly

C．carefully

D．closely

钢筋混凝土预制桩在打桩施工中，下列说法不正确的是______。

A．打桩顺序可根据桩的规格先小后大，先短后长

B．用落锤或单动汽锤打桩时，最大落距不大于1 m

C．桩帽与桩周围的间隙为5～10 mm

D．当发现贯入度剧变即暂停打桩