A holder is a ______ to the bill.
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The sequence of comparing documents and L/C is firstly in ______ direction and then in ______ direction.
The issuer of the invoice is the ______ and the invoice must be made out in the name of the ______ .
上皮细胞的侧面可见
A. 桥粒
B. 半桥粒
C. 质膜内褶
D. 微绒毛
关于排卵的描述,哪项不正确( )
A. 一般发生在月经周期的第14天
B. 排卵前,成熟卵泡突出卵巢表面,致使局部卵泡壁、卵泡膜、白膜变薄缺血,形成半透明的卵泡小斑;
C. 排卵前,卵丘与卵泡壁分离,漂浮在卵泡液中
D. 排卵时,次级卵母细胞完成第二次减数分裂形成卵细胞,并排出卵巢