在△ABC中,若(1+tanA)(1+tanB)=2,则角C是( ) A.45°

题型:选择题

问题:

在△ABC中,若(1+tanA)(1+tanB)=2,则角C是(  )

A.45°或135°

B.45°

C.135°

D.225°

考点:两角和与差的三角函数及三角恒等变换
题型:选择题
完形填空。
    Tiffany, a 16-year-old girl, was very, shy. Last September, her best friend, Sophie, movedabroad
with her family because she had to continue her studies in America. She even said shewould not come
back for at least a few years. Tiffany became    1   and helpless. "I wasreally sad the moment I heard the
bad news and I didn't know what to do," Tiffany recalled (回忆). "I    2   myself in my room for a whole
week. It was then that my aunt took me to asports club one Saturday and I saw' so many young people
playing various sports there. I signedup for a beginners' course in volleyball and since then I have been
playing this sport. Now I practise twice a week there. It is wonderful playing sports in this club and I
have made lots of     3   as well. What's more, I feel I am much healthier than before."
    The most basic aim of playing sports is that you can improve your health even if you are not very
good at sports.    4   , you can get to know a circle of people at your age while playing sports. Tiffany
used to be a very quiet girl. Since she joined the sports club, she has opened up herself and now she
has become very    5   and enjoys meeting and talking with others.
     For most people, that is one of the attractions of joining a sports club. You can get to knowother
young people who have similar interests. You don't have to sit down and talk to strangers.You go in
for sports and it is easier to understand your partners on the same team. Now Tiffany is quite    6    her
friends and she has also gained more confidence.
    Try to do regular sports. The mind needs exercise as well as the body.
( )1. A. angry        
( )2. A. shut        
( )3. A. trouble      
( )4. A. So far      
( )5. A. active      
( )6. A. generous to  
B. lonely          
B. hurt    .      
B. mistakes        
B. In addition    
B. strong          
B. different from  
C. tired        
C. enjoyed      
C. money        
C. Once again  
C. lucky        
C. popular with
D. surprised              
D. helped                  
D. friends                
D. After all              
D. independent        
D. disappointed
题型:选择题

关于地轴的说法,不正确的是[ ]

A.地轴与地球表面的交点是北极点和南极点

B.地轴是地球自转的旋转轴

C.地球上有一根巨大的地轴

D.地轴是一根假想的轴线

题型:选择题

生长激素缺乏症rhGH替代疗法的疗程是()

A.6个月

B.1年

C.5年

D.用至骨骺愈合为止

E.终身用药

题型:选择题

普通水泥砂浆防水层终凝后,应及时进行养护,养护温度不宜( )。

A.高于5℃

B.低于5℃

C.低于15℃

D.高于30℃

题型:选择题

在开放的市场经济中,()是保持经济稳定的重要内容之一。

A.国际收支平衡

B.国内收支平衡

C.人均收入总和

D.国家资产的流动

更多题库