口腔检查的特殊检查为
A.视诊
B.叩诊
C.扪诊
D.温度刺激
E.问诊
参考答案:D
I often help my parents _____ Saturday. [ ]
A. in
B. at
C. on
“蚁穴溃堤”揭示了生物对环境的影响。 ( )