有主胞胎作用的是（）。
A．任脉
B．督脉
C．冲脉
D．带脉
E．跷脉
参考答案：A
38.—What’s happened to Mary?
—She was ____ frightened. She was also robbed.
A．less than
B．no less than
C．more than
D．no more than
猪的嗅觉非常灵敏，猪对气味的识别能力高于狗1倍，比人高（）倍。
A、4-5
B、5-6
C、6-7
D、7-8
