用一个字来描述药物信息的特点，紧密结合临床，体现( )
A．“精”B．“广”C．“细”D．“快”E．“真”
参考答案：A
I wonder how it ____ that Chinese climbers successfully finished the torch relay on the Mount Qomolangma, where the air is so thin.
A．came out
B．came across
C．came over
D．came about
抗原
