从粪便中分离到一种细菌，检验其是否为志贺菌属应该进行。分离培养出可疑菌落，初步鉴定可
题型：单项选择题 案例分析题
问题：
从粪便中分离到一种细菌，检验其是否为志贺菌属应该进行。
分离培养出可疑菌落，初步鉴定可用（）
A.试探性凝集试验
B.耐药性变异
C.传代法
D.初步生化反应
E.A+D
题型：单项选择题 案例分析题
| 根据短文内容，从方框内选择合适的单词并用其适当形式填空，使短文完整、连贯。 | |
 nd reading e-mail have become one of the most popular daily activities around the world, either for business or for pleasure. Now, more and more teachers and students are 1 this form (形式) of communication to 2 their language skills, particularly in English. E-mail has become so popular because it's quite 3 . In the past, teachers often 4 pen pal projects so that their students could 5 ideas with their pen pals. But sending and 6 paper letters could take a few weeks sometimes, so students might lose 7 in the project some day. Now with e-mail, __8__ , messages can be sent or received 9 on the Internet. 10 of waiting for days or weeks, students can receive a reply during days, hours, or even minutes. |