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问题 填空题

5.3×0.42的积里有______位小数，保留两位小数约是______．

答案

5.3×0.42=2.226，

2.226≈2.23．

答；5.3×0.42的积里有三位小数，

保留两位小数约是2.23．

故答案为：三，2.23．

单项选择题

男性，30岁。原有风心病史，因持续性发热，乏力，纳差来诊。经检查拟诊为亚急性感染性心内膜炎，体格检查时下列哪个体征不可能出现

A．淤点
B．环形红斑
C．心脏杂音无变化
D．心率40次/分，心电图示Ⅲ度房室传导阻滞
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单项选择题

"I would almost rather see you dead." Robert S. Cassatt, a leading banker of Philadelphia, shouted when his twenty-year-old eldest daughter announced that she wanted to become an artist.
In the 19th century, playing at drawing or painting on dishes was all right for a young lady, but serious work in art was not. And when the young lady’s family ranked among the best of Philadelphia’s social families, such an idea could not even be considered.
That was how Mary Cassatt, born in 1844, began her straggle as an artist. She did not tremble before her father’s anger. Instead; she opposed him with courage and at last made him change his mind. Mary Cassatt gave up her social position and all thought of a husband and a family, which in those times was unthinkable for a young lady. In the end, after long years of hard work and perseverance, she became America’s most important woman artist and the internationally recognized leading woman painter of the time.

What made Mary Cassatt’s "struggle" to become a recognized artist especially hard
[A] She was a woman.
[B] Her father opposed her.
[C] She had no social position.
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