问题
单项选择题
______不是滚动导轨的缺点。
A.动、静摩擦系数很接近
B.结构复杂
C.对脏物较敏感
D.成本较高
答案
参考答案：A
搜题请搜索小程序“爱下问搜题”
______不是滚动导轨的缺点。
A.动、静摩擦系数很接近
B.结构复杂
C.对脏物较敏感
D.成本较高
参考答案：A
| 阅读下列短文，填写表格。 | ||||||||||||||||||
| Amy: What's your favourite fruit, Bai Ling? Bai Ling: Apples. Because they're sweet. Mike: I like fruit. But I don't like oranges. They're sour. I like pears. They're yummy. Wu Yifan: I like potatoes. They're fresh. What about you, Sarah? Sarah: I don't like potatoes. But I like fish. Because it's tasty. Zhang Peng: I like fish, too. It's very healthy.
|