问题
单项选择题 A1/A2型题
枸橼酸盐试验阳性的是（）。
A.克雷伯菌属
B.埃希菌属
C.志贺菌属
D.爱德华菌属
E.耶尔森菌属
答案
参考答案：A
解析：在肠杆菌科中，埃希菌属、志贺菌属、爱德华菌属、耶尔森菌属枸橼酸盐试验阴性，克雷伯菌属、沙门菌属阳性。
搜题请搜索小程序“爱下问搜题”
枸橼酸盐试验阳性的是（）。
A.克雷伯菌属
B.埃希菌属
C.志贺菌属
D.爱德华菌属
E.耶尔森菌属
参考答案：A
解析：在肠杆菌科中，埃希菌属、志贺菌属、爱德华菌属、耶尔森菌属枸橼酸盐试验阴性，克雷伯菌属、沙门菌属阳性。
| 完形填空。 | |||
| Here are my favorite photos. 1 the first one, you can find it's 2 . I'm wearing a T-shirt and sitting on the grass. The 3 one is a photo of my family. I'm 4 computer games. My grandfather is playing Erhu. My father is 5 a newspaper. My grandmother is talking about the TV show 6 my sister. And my mother is 7 the table. I love this photo very much. In the third one, there are two 8 . They are my friends, Tim and his brother. They are playing basketball. In the last one, I'm singing and my friends are dancing. 9 I see these photos, I'm very happy. They make me think of the happy 10 . I will keep the photos all my life. | |||
| ( )1. A. In ( )2. A. day ( )3. A. first ( )4. A. going ( )5. A. reading ( )6. A. to ( )7. A. swimming ( )8. A. girls ( )9. A. When ( )10. A. year | B. At B. night B. second B. doing B. seeing B. with B. sitting B. boys B. Where B. age | C. For C. summer C. third C. playing C. looking at C. about C. buying C. women C. Why C. hour | D. About D. spring D. fourth D. reading D. writing D. on D. cleaning D. men D. How D. time |