【单选题】听力原文:M:Did you hear that Bob got sick yesterday during the final examination? W:Yes,I did.I think lately he has bitten off more than he can chew in studying and working. Q:What does the woman mean? (1...
A.
He always eats more than he can chew.
B.
He eats while studying and working.
C.
He got sick because he ate too much.
D.
Bob is trying to study and work too much.
【单选题】将一个变量stab的值清除(即成为空串)的命令是()
【单选题】某有机物的结构简式为 ,其性质有下列说法: ①含酚羟基,遇FeCl 3 溶液显紫色 ②结构中的酚羟基、醇羟基、羧基均能与金属钠反应,lmol该有机物能与3mol钠反应 ③含有羧基,lmol该有机物与lmol NaHCO 3 反应 ④能与羧酸发生酯化反应,也能与醇酯化反应,也可以进行分子内酯化反应 ⑤能与Cu(OH) 2 发生反应,该有机物1mol与2.5mol Cu(OH) 2 反应 上述说法错误...
【单选题】Chaplin lived a stable and happy life in his later life.
【单选题】下列有关脂肪酸的叙述,错误的是
A.
脂肪酸可溶于热乙醇、乙醚、三氯甲烷等有机溶剂
【单选题】Charles Chaplin lived in ______ when he was a boy.
【单选题】Chaplin lived the last year of his life in Switzerland, where he was buried in 1977.
A.
卓别林晚年定居于他1977年逝世后安葬在那里的瑞士。
B.
卓别林晚年定居瑞士,1977年逝世后安葬在那里。