腺样囊性瘤最常见于下颌下腺。
参考答案:错
Growing economic problems were highlighted by a slowdown in oil output.
A.accounted for
B.worked out
C.made prominent
D.taken for granted
标准流量计的误差应只有被检流量计误差的(),并应定期用更高一级精度的标准器对标准流量进行校对。
A、1/5
B、1/4
C、1/3
D、1/2