有人将薄伽丘的《十日谈》与但丁的《神曲》并称为“人曲”。这是因为该书

看图写出两道乘法算式和两道除法算式.

举重是我国的优势体育项目，如图所示，运动员需将杠铃举过头顶，等到裁判判定站稳之后才能算成绩有效．在挺举项目中，两位运动员用相同时间把同样重的杠铃举起，一位运动员将杠铃举起1.9m，另一位运动员将杠铃举起1.8m．如果他们对杠铃所做的功分别为W₁和W₂，功率分别为P₁和P₂，则下列关系式中正确的是（   ）

下列分子中的σ键是由两个原子的s轨道以“头碰头”方式重叠构建而成的是

根据短文内容，选择正确答案。
B
    I'm Kate from the UK. I'm in the Chinese club in our school. I like Chinese and I think it's interesting. My Chinese is very good. I can tell and write stories in Chinese. My favorite writer (作家) is Mo Yan from China. Now let me tell you something about my favorite writer and his family.     Mo Yan's real (真的) name is Guan Moye. Mo Yan is his pen name. This year Mo is 57 years old. His birthday is on February 17th. Mo writes stories very well. He can also write with his left hand (左手). Mo has a daughter. Her name is Guan Xiaoxiao. The girl can also write stories but she can't write with her left hand.