Sam can sing English songs _____ , but I can't. [ ]
A. a lot
B. good
C. well
D. much
答案:C
360÷3的商是______位数,余数是______,364÷6=______…______.
诊断肺结核的金标准是()
A.痰结核菌培养阳性
B.抗结核抗体阳性
C.PPD强阳性
D.痰PCR阳性
E.抗核抗体阳性