（）不能承受轴向载荷。A．调心球轴承 B．深沟球轴承 C．圆柱_爱下问搜题

搜题请搜索小程序“爱下问搜题”

问题单项选择题

（）不能承受轴向载荷。

A．调心球轴承

B．深沟球轴承

C．圆柱滚子轴承

D．圆锥滚子轴承

答案

参考答案：C

完形填空

完形填空。

     "Who   1.   these gifts, Jenny ?"Li Ming   2.   quietly. "Did Santa?"
     "I   3.    know," Jenny whispers to Li Ming. "I don't think so. I think my Mum and Dad brought   4.  ,
but Lynn is little! She   5.   Santa brought them!"

( )1. A. bring
( )2. A. asks
( )3. A. do
( )4. A. they
( )5. A. thinking

B. brought
B. ask
B. don't
B. then
B. think

C. bringing
C. asking
C. did
C. them
C. thinks

问答题

根据下列材料，完成（1）—（3）题。材料一美国本土年降水量分布及棉花带范围图材料二图中甲乙两城市气温比较表

据表比较甲、乙两城市的气温差异，并解释其原因。