There _________ lots of healthy food on the table.[ ]
A. have
B. has
C. are
D. is
答案:D
测定砂浆强度等级时的试块的尺寸是()。
A.100*100*100mm
B.150*150*150mm
C.200*200*200mm
D.70.7*70.7*70.7mm
列表介绍卵巢良性与恶性肿瘤的鉴别诊断。