甲乙两个质点同时同地向同一方向做直线运动，它们的v﹣t图象如图所示，则（   ）

植物体细胞杂交与动物细胞工程中所用技术与原理不相符的是（　　）

某化学兴趣小组利用图1装置探究制取气体的原理、方法及性质．结合装置图，回答下列问题：

请回答下列问题：

⑴Is it hot?____                                                  A. It's on the second floor.

⑵What's the weather like in Beijing?____        B. It's warm and sunny.

⑶Where is the library?____                              C. Yes,we do.

⑷What time is it?____                                      D. No,it isn't.

⑸Do you have a computer room?____            E. It's 6 o'clock.