脂多糖是
A.K抗原B.H抗原C.Vi抗原D.O抗原E.M抗原
参考答案:D
解析:O抗原,即为革兰阴性菌细胞壁脂多糖中的特异性多糖,具有种属特异性。
德国的弗赖堡市因推行先进的环保政策而著称,下图是弗赖堡市的中心商业区和老市区及其周边交通网。关于图中交通设施的叙述,不正确的是
A.为限制车辆入市区,在老市区边缘设置一般停车场
B.为增加公交车的机动性,连接市内电车线路与城市间铁路
C.为方便市民出入,电车车站的密度与人口分布密度呈正相关关系
D.为方便市民到郊外绿地、农庄度假娱乐,开辟自驾车停车换乘站点,在指定区域换乘巴士或火车
句型转换
1. My last day off was wonderful.(就画线部分提问)
__________ was __________ last day off?
2. There was a basketball match yesterday.(用tomorrow改写)
There __________ __________ __________ __________ a basketball match tomorrow.
3. He spent two years learning Chinese.(就画线部分提问)
__________ __________ did he spend learning Chinese.
4. My little brother was so short that he couldn't reach the box.(改为同意句)
My little brother was __________ short __________ __________ the box.
5. I think my brother is the funniest person in my family.(改为同意句)
I think my brother is __________ __________ __________ __________ in my family.