军团菌肺炎是由冷却塔中的嗜肺军团菌形成的（）引起的。
参考答案：气溶胶
(2013·安徽马鞍山两校第一次联考)—Can I ask you a few straightforward questions about yourself?
—Sure. I like ________ when people are open and direct.
A．that
B．this
C．it
D．them
