脂多糖存在于（）微生物的细胞壁。
A.真菌
B.革兰氏阳性菌
C.革兰氏阴性菌
D.芽孢杆菌
参考答案：C
某病人食欲不振、腹胀便溏、身体困倦、少气乏力，面色萎黄，其病机是
A．心脾两虚
B．气血两虚
C．脾肺气虚
D．脾气虚
E．脾阳虚
The weather yesterday was ______ it is today. [ ]
A. not as wetter as
B. not wetter than
C. more wetter than
D. wetter as
