头孢菌素类抗菌作用的部位是:
A.二氢叶酸合成酶
B.移位酶
C.核蛋白50S亚基
D.二氢叶酸还原酶
E.细胞壁
参考答案:E
Read and answer. 回答问题。
1. What food do your parents like?
2. What is their favourite fruit?
3. What's for breakfast every day?
4. How much for a melon?
5. Which is good for your health (健康), pop or milk?
150多年来,世博会基本上都在发达国家举行,而2010年世博会选择在中国上海,并且成功举办。这说明了 ( )
A.我国已经成为发达国家
B.社会主义具有无比优越性
C.提出构建和谐世界的理念
D.综合国力日益增强