用pH梯度萃取法从氯仿中分离生物碱时,可顺次用何种缓冲液萃取
A.pH=8~3
B.pH=6~8
C.pH=8~14
D.pH=3~8
E.pH=14~8
参考答案:A
在下列各句的空格内填上一个适当的完整的单词,该词的首字母已给出。
小题1:The policeman asked politely, “ May I look at your driver’s l_______?”
小题2:There will be a Chinese painting e________ in the national museum next week.
小题3:Pass me that pair of glasses, please. I can’t see the words c___________.
小题4:What a nice girl Lucy is! She often h_________to do housework.
小题5:Betty can speak two l__________, Chinese and English.
本体感觉神经肌肉促进法(PNF)治疗因肌力减弱引起的不协调运动时,最有效的方法为
A.收缩-松弛B.控住-松弛C.反复收缩D.最大阻力E.慢逆转