若血钾增高时，降压治疗不宜使用
A．β受体阻滞剂B．袢利尿剂C．钙通道阻滞剂D．血管扩张剂E．血管紧张素转换酶抑制剂
参考答案：E
August 8th of 2008 will be the most exciting day, ________ the 29th Olympic Games will be
held on that day. [ ]
A. if
B. when
C. so that
D. because
低温与普冷的分界线是（）。
A.90K
B.110K
C.120K
D.140K
