河谷是典型的河流堆积地貌。
错
河谷属于流水侵蚀而形成的典型地貌。
“When will your father _________ Shanghai?” “He ________ at 8:00 this Monday.”
A．arrive at, will arrive
B．arrive in , will arrive
C．arrive ,will arrive in
D．arrive, will arrive at
紫外线可致
A．白血病、肺癌B．肝癌C．间皮瘤D．肝血管肉瘤E．皮肤癌
