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
参考答案:B
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
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. ____________________