下列疾病中,哪些好发于冬春季()
A.水痘
B.乙型肝炎
C.流行性乙型脑炎
D.流行性斑疹伤寒
E.地方性斑疹伤寒
参考答案:A, D
____ the terrible weather and the possible dangers ahead in the mountains, he insisted on going there alone.
A.Because of
B.In front of
C.Along with
D.Regardless of
单动双管的()钻进中不转动。
A.内管
B.外管
C.内外管