影响空调效果的主要因素有哪些？
参考答案：
室外气温、湿度的变化，太阳照射强度的变化，室内使用散热设备的负荷，室内人员密度的影响等。
Not only _____ polluted, but _____ crowded.
A．was the city; were the streets
B．the city was; the streets were
C．was the city; the streets were
D．the city was; were the streets
患者，65岁，查体：心尖搏动出现在剑突下，且深吸气时增强，肺动脉瓣第二心音增强。应首先考虑的是
A．冠心病
B．高血压性心脏病
C．风心病
D．肺心病
E．心肌炎
