X射线机图中散弹与普通子弹区别较大，外观可看到红色或（）塑料弹壳和银色底部。
A.蓝色
B.深红色
C.黑色
D.淡黄色
参考答案：A
She always gets tired. We all think she is _____ heavy. [ ]
A. too much
B. much too
C. too many
D. many too
呼吸困难的因及临床表现
