下列哪种症状复苏病人可用胸外心脏挤压
A．有心包填塞
B．合并张力性气胸
C．有新鲜的肋骨骨折
D．胸腔内出血
E．急性心肌梗死后
参考答案：E
The factory produces half a million pairs of shoes every day, 85% ____ sold abroad.
A．of them are
B．of them is
C．of which is
D．of which are
—It is very important for young people to learn _____ useful foreign language.
—I know that, so I am working hard at English. [ ]
A. a
B. an
C. the
D. the
