3个异戊二烯单位聚合而成的萜类名称为( )
A．单萜B．二萜C．倍半萜D．三萜E．四萜
参考答案：C
解析：[知识点] 萜类的结构
Make sentences. 连词成句，请注意标点符号。
1. do get when you up (?)
2. go bed at usually I 9:00 to (.)
3. season you best do which like (?)
4. your when is birthday (?)
5. June birthday is her in (?)
6. is homework my doing brother (.)
7. they what doing are (?)
有助于白喉早期诊断的细胞学检查方法是：（）
A．于假膜与黏膜交界处取材，涂片染色后查白喉杆菌
B．病变部位取材行细菌培养和毒力试验
C．用2%亚碲酸钾液涂于假膜上染色
D．抽血用EIA查白喉外毒素抗体
E．用荧光素标记白喉抗毒素染色，荧光显微镜下检出白喉杆菌
