阅读下面短文判断句子对(√)错(×)。

      Do you like snow? I think you will say " Yes ". In winter, the weather is very cold. Many children like to

play with snow. Some of them make snowmen. They're very happy. Where does the snow come from? It

comes from little water drops. When the temperature falls below (在……以下) 0℃, the little water drops

become snow. They're white and clean, like small flowers. They make the world more beautiful.

( ) 1. The weather is very hot in winter.

( ) 2. Many children like to play with snow.

( ) 3. We can't make snowmen when it snows.

( ) 4. The snow comes from litter water drops.

( ) 5. When the temperature falls below 0℃, it begins to snow.

右冠状动脉摄影体位通常为（）。

A.左前斜位45°

B.右前斜位30°加足位15°～20°

C.左前斜（LAO）45°加头位（CRA.25°～30°

D.左前斜位30°～45°加头位20°～25°

E.正位加足位25°～30°