水冷却式冷凝器用水（）制冷剂放出的冷凝热。
A.蒸发
B.冷凝
C.压缩
D.吸收
参考答案：D
. ____ by the thought that she was suffering a heart attack, she screamed for help.
A．Terrifying
B．Terrified
C．Being terrified
D．Having terrified
单核细-巨噬细胞系统包括（）
A.原单核细胞
B.血液单核细胞
C.幼单核细胞
D.脾
E.淋巴结
