问题
单项选择题
蝶阀的启闭件是（）。
A、阀体
B、蝶板
C、阀杆
D、密封圈
答案
参考答案：B
搜题请搜索小程序“爱下问搜题”
蝶阀的启闭件是（）。
A、阀体
B、蝶板
C、阀杆
D、密封圈
参考答案：B
| 读短文，填数。 | ||
| It's a sunny day. I don't go to school. I get up at 6: 30. I have breakfast at 7:00. I eat some noodles. Then I go shopping. I want a pair of sunglasses. They're cheap. They're only twenty-seven yuan. I go home at 4:00.
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