在△ABC中，若cosAcosB>sinAsinB，则△ABC的形状是[ ] A_爱下问搜题

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问题选择题

在△ABC中，若cosAcosB>sinAsinB，则△ABC的形状是[ ]

A.锐角三角形

B.直角三角形

C.钝角三角形

D.不能确定

答案

答案：C

完形填空

       I have(有) three friends.   1   are Kangkang, Maria and Fred. Kangkang is thirteen. Maria and
Fred   2   fourteen. Kangkang is from China. Maria and Fred are from the U.S.A. Maria is   3   China
now.   4   in Class 4, Grade 7. She and Kangkang are in the same class.   5   telephone number is
8267-6858. I like(喜欢) my friends.

( )1. A. He
( )2. A. am
( )3. A. in
( )4. A. He
( )5. A. She

B. They
B. is
B. from
B. He's
B. She's

C. These
C. are
C. to
C. She's
C. He

D. Those
D. be
D. /
D. She
D. Her

单项选择题

当画面中有选择区域时，按下键盘中的Shift键，可（）画面中的选择区域。

A、反选

B、增加

C、减少

D、取消