Mr white with his friends often ______ a trip.[ ]
A. have
B. has
C. is
D. go
答案:B
囊壁内衬单层立方上皮,无纤毛,无黏液,囊壁含有薄层平滑肌()
A.包含囊肿
B.中肾管囊肿
C.副中肾管囊肿
D.前庭大腺囊肿
E. * * 上皮囊肿
胡黄连的性状特征有
A.圆柱形,略弯曲
B.有较密的环状节 C.
C.气微,味极苦
D.木质部有4~10个类白色点状维管束排列成环