分解素因数72=______．
72=2×2×2×3×3．
故答案为：2×2×2×3×3．
女性，67岁。因急性下壁、右心室梗死急诊入院，心电图监测示Ⅲ度房室传导阻滞，心室率34次/分，血压80/50mmHg。处理的最佳方案是
A．地塞米松B．肾上腺素C．多巴胺D．植入临时人工心脏起搏器E．阿托品
We have made ____ clear that the goods should be packed in cartons.
A. it
B. them
C. this
D. which
