470÷50=9…20;
635÷90=7…5;
124+21=145;
验算:
—Is Tom still smoking?
—No.By next Saturday he _____________ for a whole month without smoking a single cigarette.
A.will go
B.will have gone
C.goes
D.has been going
用于丙型肝炎联合干扰素抗病毒治疗的药物是()用于人禽流感抗病毒治疗的药物是()
A.法昔洛韦
B.扎那米韦
C.利巴韦林
D.恩替卡韦
E.奈韦拉平