― Would you like to come to the dinner party here on Saturday?

― Thank you. I’d love to, ______ I’ll be out of town at the weekend.  

A．because

B．and

C．so

D．but

对于小剂量药物需要进行的检查是

A．重量差异检查
B．pH检查
C．含量均匀度检查
D．溶出度检查
E．不溶性微粒检查