调制化学膨松面团时，碳酸氢铵的用量一般不超过面粉用量的
A．1%
B．1.5%
C．2%
D．2.5%
参考答案：A
市值加权法是根据指数成分股的市值权重，按从大到小的顺序，选取前N只股票模拟股票指数。（）
—He looks unhappy.
—Yes, but he can't say what it is ______ is bothering him.[ ]
A. as
B. that
C. what
D. which
