大型桥梁和船舶的钢结构宜选用（）材料。A．16Mn B．20Gr C．Q235 D．_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

大型桥梁和船舶的钢结构宜选用（）材料。

A．16Mn

B．20Gr

C．Q235

D．45

答案

参考答案：A

完形填空

完形填空。

     I am   1   English girl.   2   name is kate. I'm twelve. I   3   a Chinese friend.   4   name is Han
Meimei . She is twelve,   5   . Han Meimei and I   6   in the same class. We are in   7   . Han Meimei
is   8   She is in Row 2. I   9   in Row 2. I'm in Row 3. We are not in the same row,   10   we are in
the same team(组).

( )1. A. the
( )2. A. I
( )3. A. am
( )4. A. She
( )5. A. too
( )6. A. is
( )7. A. Class One,
           Grade One
( )8. A. 5 Number
( )9. A. am not
( )10. A. and

B. an
B. Her
B. know
B. Her
B. two
B. am
B. Grade One ,
     Class One
B. Number 5
B. isn't
B. but

C. a
C. My
C. have
C. His
C. to
C. are
C. One Class,
     One Grade
C. in Number 5
C. amn't
C. or

D. /
D. She
D. has
D. My
D. please
D. /
D. class one,
     grade one
D. Number five
D. aren't
D. too

填空题

如图6虚线为一匀强电场的等势面。一带负电微粒从A点沿图中直线在竖直平面内运动到B点，不计空气阻力，此过程中粒子电势能，动能。(填“增加”、“不变”或“减少”)