荚膜的作用是( )
A.保护
B.营养
C.运动
D.生殖
细胞壁的主要功能是保护,有些细菌生长的中后期细胞壁增厚形成荚膜,故荚膜的作用是保护.
故选:A
You want to use the Web to let Eternal users or your customers look at corporate information. But you want to keep installation at the user end (66) and you don’t want just anyone to get (67) your databases.
That may be where an application server enters the picture. For more user machine independent, these t software packages, typically written in the (68) programming language.
for use on Windows NT-based systems, act as go-betweens linking browser-equipped end users to the databases that (69) the information they need to (70) 。
(66)处填()。
A.simple
B.simply
C.single
D.singly
设ln2x为f(x)的一个原函数,则f(x)=()。