阑尾处发生的肿瘤答案是：
A．阑尾类癌。
参考答案：A
You must be tired now. Why not ______ a rest?[ ]
A. to stop to have
B. to stop having
C. stop to have
D. stop having
天然气（）的测定应每月一次，二氧化碳含量的测定应按GB/T13610执行。
