防己黄芪汤与当归拈痛汤的组成药物中均含有( )
A．甘草白术B．白术防风C．防风当归D．当归桂枝E．桂枝茯苓
参考答案：A
已知直线l1：（m+2）x+（m+3）y﹣5=0和直线l2：6x+（2m﹣1）=5，求满足下列条件的实数m的取值范围或取值：
（1）l1∥l2；
（2）l1⊥l2．
It is important to have your eyes examined regularly to check for any sign of eye disease that may not have any ______.[ ]
A. symptom
B. similarity
C. sample
D. shadow
