空调机正常工作时压缩机把蒸发器内产生的低温低压气体吸入汽缸内。（）
参考答案：对
30. It is said that Columbus Day is ______ the arrival of Christopher Columbus in the New World in the USA.
A. in honor of B. for the honor of C. in favor of D. in place of
变异型心绞痛，不宜使用
A．硝酸甘油软膏
B．硝酸甘油贴片
C．普萘洛尔
D．硝苯地平
E．中药丹参
