只要能维持进料量和出料量之间的物料平衡，就能保证精馏塔的稳定操作。
参考答案：错
This basket he sent me yesterday _______ many kinds of fruits, _______ apples and pears.
A．contained; including
B．contained; included
C．included; containing
D．included; contained
法式水晶甲的服务时间为（）。
A.60min
B.90min
C.120min
D.150min
