处方开山漆调剂应付（）。
A、干漆
B、二七
C、景天二七
D、竹节二七
参考答案：B
________ you may have，you should gather your courage to face the challenge.
A．However a serious problem
B．What a serious problem
C．However serious a problem
D．What serious a problem
加速装置的功用是什么？
