My sister __________ in a shoe company.[ ]
A. work
B. working
C. works
答案：C
It's important to eat a________diet.[ ]
A. balanced
B. balance
C. balancing
D. balances
自身抗体检测对某些自身免疫病诊断的价值正确的是
A．敏感性高，特异性强B．敏感性低，特异性强C．敏感性高，特异性较低D．敏感性低，特异性低E．相关性不明显
