第16题: [单项选择]如果轴截面为正方形的圆柱的侧面积是4π，那么圆柱的体积等于______． A. π B. 2π C. 4π D. 8π 参考答案:B 答案解析:[解析] 因为圆柱的轴截面是正方形，所以圆柱的高等于底面圆的直径．设底面圆的半径为r，则高为2r.由题意可得：2πr×2r=4π，解得：r=1．所以圆柱的体积为πr2×2r=2π
第22题: [单项选择]下列属于质量鉴定专家组应履行义务的是( )。 A. 通过申请人向争议双方当事人了解有关情况 B. 勘察现场 C. 发表质量鉴定意见 D. 正确、及时地做出产品质量鉴定报告 参考答案:D
第23题: [单项选择]{{B}}Questions 11 to 18 are based on the conversation you have just heard.{{/B}} A. Bob will probably remain angry until the man apologizes. B. Bob might not be really angry with the man. C. Bob has also been mad at her recently. D. The man should ask Bob to apologize. 参考答案:A 答案解析:[听力原文]
M: I don’t know what I could have done to make Bob so mad at me.
W: Me neither, but it’s li
