A．改变音调
B．改变响度
C．改变声音的传播方向
D．让乐器振动
答案：A
某项目在经营年度外购原材料、燃料和动力费为1100万元，工资及福利费为500万元，修理费为50万元，其他费用为40万元，则该项目年度经营成本为（）万元。
A．1600
B．1640
C．1650
D．1690
A client with a long history of ulcerative colitis takes sulfasalazine (Azulfidine) to control the condition. The nurse would anticipate the client to have which nutritional deficit that can occur as a result of taking this drug
A．Colbalamin.
B．Folic acid.
C．Niacin.
D．Iron.
