【单选题】---- ________ terrible the Japan Earthquake was! ----That’s true. Many ________ people lost their lives in it.
【简答题】Many people like travelling for their holiday. They go to ___1___, seaside or forests. Some people like ___2___, so they like to visit some old interesting places. In many countries, the travel agency...
【简答题】以下哪些关于连续型随机变量及其概率分布的陈述是正确的:
I. 概率分布可以由一个概率密度函数来描述
II. 一个事件E发生的概率可以由P(X=E)来计算
III. 概率曲线下的面积总和为1A. 只有I正确 B. 只有I和II正确 C. 只有I和III正确 D. 只有II正确 E. 只有III正确
【单选题】According to the passage, many people initially thought that E.L.Drake had made a mistake by____.
A.
going on a whaling expedition
B.
moving to Pennsylvania
【多选题】下列有关物理量的叙述哪些是正确? 1.物理量都是模拟量; 2.物理量并不都是连续变化的; 3.在大多数物理系统中,物理量以数量的形式被观察、记录、变换与运算,或以其他形式被利用; 4.物理量必须用数字表示法表示。
【简答题】运动员在开赛叫到后()未出场,将被视为弃权。