安排骨质疏松的老人做适量的户外运动，例如（）。
A.慢跑、步行
B.踢足球
C.跳绳
D.打羽毛球
参考答案：A
An analyst does research about derivative products. Which ofthe following will most likely decrease in value if the price of the underlying asset increases in value（）
A. A long position in put contract.
B. A long position in future contract.
C. A long position in call contract.
肠伤寒的肠溃疡特征
A．溃疡呈环形与肠的长轴垂直B．溃疡呈长椭圆形与肠的长轴平行C．溃疡呈烧瓶状口小底大D．溃疡边缘呈堤状隆起E．溃疡表浅呈地图状
