通过喷油器调压螺钉可调整（），以改变喷油器的喷油压力。
参考答案：调压弹簧预紧力
---Why was Mr. Smith suddenly fired by his boss?
---Because he was found_______ in the non-smoking office.
A．smoking
B．smoke
C．to smoke
D．smoked
妊娠子宫可以从初始的30～60g增加至末期的()
A．600g
B．1000g
C．300g
D．1300g
E．1600g
