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问题 单项选择题

李姓男患者，69岁。体质虚弱，气短喘促，声低懒言，少气乏力，医嘱给予人参小剂量炖服。蒸炖时最适宜的器具是（）

A.瓷碗

B.砂锅

C.铁碗

D.铝碗

E.铜碗

答案

参考答案：B

选择题
下列说法正确的是（　　）

A．互为同位素的原子，质量数一定相同

B．互为同位素的原子，质子数不一定相同

C．由一种元素组成的物质，一定是纯净物

D．12C、13C、14C都是碳元素的核素
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改错题

下列各句中均有一处错误，请找出并改正在句后的横线上。

1. The forth day of the week is Wednesday.                    ____________________                

2. Mario is a unusual piano player.                                  ____________________

3. March 8th is Woman's Day.                                       ____________________   

4. Deng Yaping join the national table tennis team in 1985. ____________________

5. Pele was a great Brazil soccer player.                           ____________________

6. You was born on March 3rd.                                      ____________________

7. The girl was born in the morning of July lst.                 ____________________

8. This is the begining of the garden tour.                         ____________________
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