Jim, ______ you have a TV? [ ]
A. do
B. is
C. are
D. does
答案:A
已知f(x)=ax2+bx+3a+b是偶函数,定义域为[a-1,2a],则a+b=______.
对头痛病人,下列哪项护理措施不妥
A.鼓励病人经常应用止痛药
B.鼓励病人进行理疗来缓解疼痛
C.鼓励病人进行放松训练
D.鼓励病人卧床休息
E.鼓励病人避免强光和噪音的刺激,保持环境的安静