实际过程的原料消耗量有可能低于理论消耗定额。
参考答案：错
--- I got my driving license today.
--- ____
A．Have a lovely day!
B．Congratulations!
C．You must have driven beautifully!
D．Could you give me a lift?
已知：如图，在△ABC中，点E是BC的中点，DE⊥BC交AB于点D，AC=10，AB=6，则△ADB的周长是______．
