题目3单选题
已知反应A+2B→C,其速率方程为A. <img src="https://tihai-oss-cloud.itihey.com/img/7dd707656e9480bf9d4a01d45f839bd9.png">B. 需由实验确定C. <img src="https://tihai-oss-cloud.itihey.com/img/d746402faf697f33ed79e9a5925eaaf3.png">D. <img src="https://tihai-oss-cloud.itihey.com/img/ed5ed18f96292ad005c40065b03c1039.png">