中医学认为与肾病综合征发生密切相关的三脏是( )
A．肺、脾、肾B．肝、肺、脾C．心、肝、肾D．心、肝、肺E．心、肝、脾
参考答案：A
铜和稀硝酸反应的化学方程式为：3Cu+8HNO3（稀）═3Cu（NO3）2+2X↑+4H2O，则X的化学式是（ ）
A．N2
B．NO2
C．NO
D．H2
It is _______ to work out this problem. You needn't go to ask the teacher. [ ]
A. enough easy
B. easily enough
C. easy enough
D. very easily
