乳化液箱的作用是（）乳化液。
A.储存、回收
B.储存、过滤
C.回收、过滤
D.储存、回收、过滤
参考答案：D
I found John _____ the desk, _____ his homework carefully.
A．seated at; to do
B．sitting at; doing
C．sat at; does
D．taking his seat at; to do
《景岳全书·新方八阵》所说“阴得阳升而泉源不竭”的治疗法则，是指
A．壮水之主，以制阳光B．益火之源，以消阴翳C．阳中求阴，阴气得复D．阴中求阳，阳气充盛E．阳病治阴，阴阳平衡
