压紧水泵密封填料时，以填料处的泄漏量（）为正好。
A.刚刚没有
B.呈线状
C.呈点滴状
D.呈柱状
参考答案：C
结合图片用本课所学单词完成对话。
A: Hello, Can I ask you a question?
B : Of course.
A: What is your dream in the 1
B: I want to be an 2
A: I think Zhai Zhigang is great.
B: Yes, I agree with you. Our country's 3 walk dream has 4
5
猪传染性胃肠炎和猪流行性腹泻都是由冠状病毒引起的。
