胸部损伤的临床表现主要有（）、（）、（）、（）、（）和（）
参考答案：胸痛；呼吸困难；咯血；休克；皮下气肿；伤口
30．One of the greatest of unhappiness，in my experience，is the difficulty we have in
accepting things as they are．
A．reasons
B．styles
C．supplies
D．Sources
. He is ____ China Daily. In other words, he works ______ China
Daily.
A．on; for
B．for; on
C．in; at
D．at; on
