腹痛的基本发生机制?
参考答案:
腹痛的基本发生机制有三种,即:内脏性腹痛;躯体性腹痛;牵涉痛。
--Will you two go to the show tomorrow?
---No. We're going to a lecture, or at least I'm planning ____.
A.it
B.to
C.that
D.so
在斜齿圆柱齿轮传动中,加大斜齿轮的螺旋角可以增加斜齿轮传动的()