一般情况下，对于气井来说，（）相位角射孔效果最好。
A、0°
B、90°
C、180°
D、都不是
参考答案：B
---- Isn’t amazing that such a good player ____ have failed to be elected to compete?
----Yes, but that is life.
A．would
B．might
C．must
D．should
