一般阀门阀芯小泄露时，应该处理（）。
A.更换
B.加入盘根
C.拧紧轧兰螺栓
D.更换轧兰螺栓
参考答案：C
用所给词的适当形式填空。
leg, hand, mouth, ear, eye, face
I have a big 1. , but I have no 2. or 3. .
I have no 4. , but I have three 5. , two long ones and a short one.
I have no 6.___ , but I can tell you the time.
I can say, "Tick, tock, tick, tock." Can you draw me?
汽车的可靠性
