题目内容

下列描述中不属于种子培养基特点的是?

A. 需要按一定的接种量进行发酵培养基的接种
B. 营养丰富,氮源含量较高
C. 最后一级种子罐中的种子培养基成分及浓度应尽可能接近发酵培养基
D. 营养丰富,其中碳源浓度高

查看答案
更多问题

好氧发酵中,在进行发酵罐溶解氧浓度的控制时,只能通过控制通气量、搅拌转速来调节氧浓度。

A. 对
B. 错

发酵培养基的组成和配比由于菌种不同、设备和工艺不同等有所差异,一般包括碳源、氮源、无机盐类、生长因子等几类。

A. 对
B. 错

采用正交法进行一个三因素三水平的实验需要进行9次实验。

A. 对
B. 错

Directions: Now, you will hear three news reports. At the end of each news report, youwill hear two or three questions. Both the news report and the questions will be spoken only once. After you hear a question, you are supposed to choose the best answer from the four choices marked A), B),C) and D).Questions 1 and 2 will be based on News ltem 1.[音频]1

A. On a northern island of Japan.
B. On a southern island of Japan.
C. On Japan's southernmost main island of Kyushu.
D. Off the east coast of Japan.

答案查题题库