第3题: [单项选择]How can a nonscientist explain an abstract theory with such ______. A. confidence B. assurance C. self-possession D. insurance 参考答案:B 答案解析:名词辨析题。assurance更强调把握性甚至暗示傲慢;confidence是对某人能力或资格坚定的信任;self-possession暗示通过控制自己而表现出的镇静;insurance意为“保险,保