【简答题】Here are the twin sisters, Lily and Lucy. They are in Miss Gao’s class. They are two new students. They’re eleven. This is their room. It’s a nice room. There are two beds in the room. One is Lucy’s a...
【单选题】下列说法正确的是
A.
用系统命名法命名有机物 ,主链碳原子数均为7 个
B.
能使KMnO 4 溶液褪色,说明苯环与甲基相连的碳碳单键变得活泼,被KMnO 4 氧化而断裂
C.
蛋白质和油脂都属于高分子化合物,一定条件下能水解
D.
1mol 绿原酸 通过消去反应脱去1 molH 2 O时,能得到6 种不同产物(不考虑立体异构)
【单选题】马克思和恩格斯合著的《共产党宣言》问世于()
【单选题】马克思恩格斯合著的《共产党宣言》问世于()年。
【判断题】John and Lily are not in the town this weekend because they have gone out for a trip.
【单选题】– Are the books , Lily and Lucy? – No. are in the classroom.