形成尿液的基本结构单位是 [ ] A．肾小管 B．肾单位 C．肾小球 D．肾小囊

-----I think you            us an explanation.

-----I will prove what I have done is right and I mean no harm.

A．give

B．owe

C．need

D．want

对于地市行来说,发生跨行业务,只和其在总行的头寸户有关,而和人行头寸户无关。

小儿体液免疫特点中，下述哪项是错误的（）

A.免疫球蛋白包括IgA，IgG，IgM，IgD及IgA5类

B.IgG有4个亚类

C.IgA含量增高提示有宫内感染可能性

D.免疫球蛋白是巨噬细胞产物

E.小儿体液免疫的发育随年龄增长逐步完善

Password is a secret series of (73) that enables a user to access a file, computer, or program. On multi-user systems, each user must enter his or her password before the computer will respond to (74) . The password helps ensure that (75) users do not access the computer. In addition, data files and programs may require a password.

A. order B. commands C. instruction D. tracks

沉筒液位计在现场调校时是用什么方法进行调校的？