(单选题)9: Everyone except Tom and John ______ there when the meeting began. A: is B: was C: are D: were ...

(单选题)3: Don’t take everything in the book for _____. A: granted B: granting C: grants D: grant ...

31:        Cats are the most popular pets among Americans. So it is not surprising there are many expressions about cats. Do you know any of them? Now let me introduce some to you. Some cats like to catch small...

(单选题)25: The nurse doesn't feel well today, _________ she still works very hard. A: but B: and C: or D: when ...

(单选题)19: The answer must ________ in finding alternative sources of energy. A: happen B: lay C: prove D: lie ...

(单选题)13: The factory has been ________ for two years. A: open B: to open C: opening D: opened ...

(单选题)1: -- Bob, would you like to come to our dinner party? --__________. A:  Yes, I would B: Yes, I' d love to C: No, I wouldn' t D: No, I don't go ...

(单选题)9: 孤立的带电导体，外表面各处的电荷面密度与表面处的曲率有关： A: 导体表面凸出的地方曲率越大，电荷面密度就越小。导体表面较平坦的地方曲率小，电荷面密度也大。 B: 导体表面凸出的地方曲率越大，电荷面密度就越大。导体表面较平坦的地方曲率...

(单选题)17: 位于委内瑞拉的安赫尔瀑布是世界上落差最大的瀑布。它高979 m 。在水下落的过程中，重力对它做的功有50%转换为热量使水温升高。如果水的比热为4.18×103 J·kg-1·K-1，这样水由瀑布的顶部落到底部而产生的温差为ΔT；1kg...

(单选题)11: 气缸内储有2.0 mol 的空气，温度为27°C ，若维持其压强不变，而使空气的体积膨胀到原体积的3倍，这时该气体的温度为T，空气体所做的功为A则有： A: T= 9.97×103 K；A = 900.5J B: T= 900.5K ；A = 9.97×103 J C: T=19.97&tim...