防护栏杆必须自上而下用安全立网封闭,或在栏杆下边设置严密固定的高度不低于( )的挡脚板或40cm的挡脚笆。
A.14cmB.16cmC.18cmD.20cm
参考答案:C
My _____ is keeping pets. I am _____ in dogs. [ ]
A. interest; interested
B. interests; interested
C. interest; interesting
D. interests; interesting
常出现"线样征"的小肠疾病是:
A.节段性肠炎
B.淋巴瘤
C.小肠吸收不良
D.肠结核
E.坏死性肠炎