21-三体综合征患儿皮纹特点必须有通贯掌、手掌三叉点。()
参考答案:错
Li Na plays____________ tennis very well. She has become _____________first Asian woman to reach a Grand Slam(大满贯) final.
A.a, the
B./, the
C.the, a
D./, a
回炼油泵抽空如何处理?