We have invited an expert ______ this area to give us a speech.
A. up
B. in
C. to
D. from
查看答案
His knowledge is only limited ______ what is taught in class.
A. in
B. done
C. where
D. to
these days, lifestyles have a tendency ____ change so fast.
A. to
B. bright
C. up
D. no
()是欧洲的文明传统。
A. 基督教
B. 道教
C. 佛教
D. 伊斯兰教
心搏骤停的最常见原因是：
A. 气管异物
B. 颅脑外伤
C. 冠心病
D. 药物中毒
微信支付 
支付宝支付