构成口腔上壁的结构是()
A.腭
B.颊
C.牙弓
D.口唇
E.咽峡
参考答案:A
解析:口腔前臂为上、下唇,侧壁为颊,上壁为腭,下壁为肌性组织。
下列哪种疾病骨髓巨核细胞减少
A.慢性粒细胞细胞性白血病
B.缺铁性贫血
C.ITP
D.急慢性再障
E.巨幼细胞贫血
—Must I turn off the gas after cooking?
—Of course, you can never be ____careful with that.
A.enough
B.very
C.so
D.Too