Look! All the food _____ on the table. [ ]
A. be
B. are
C. is
D. am
答案:C
女性,18岁,右大腿下端肿痛2月余,摄片见股骨下端有境界不清的骨质破坏区,骨膜增生及放射状阴影,两端可见骨膜三角,最可能的诊断是
A.骨髓炎
B.骨结核
C.骨肉瘤
D.骨巨细胞
E.骨转移癌
“电子商务”英文正确写法是:()
A.electronics commerce
B.electronic contract
C.electronic commerce
D.electron commerce