肩关节脱位发生在（ ）
A．前下方
B．上方
C．后下方
D．下方
参考答案：A
丙烯物化性质是（）色气体，常压下沸点（）。
—I'm going to have my English test tomorrow.
—_____.[ ]
A. Good luck
B. That's all right.
C. That's right
D. It doesn't matter
