【判断题】贮存的颗粒饲料含水率应低于 11%,高于 11%的饲料易霉变。贮藏在空调环境的由天然原料 制造的饲料,应在 6 个月内使用完毕。
【判断题】键的极性是由于成键的两个原子的电负性不同引起的。
【判断题】键的极性是由成键两原子的电负性不同引起的。
【简答题】(inform) He had inside __________ as to what was going on in his homeland.
【单选题】(Did) anyone (inform) you (with) the change of the schedule that (had been decided) yesterday?
【单选题】下列关于极性和极化说法正确的是:
B.
不相同的两个原子之间形成的共价键一定有极性,即一定是极性共价键
D.
键的极性是由于成键的两个原子的电负性不同引起的
【单选题】听力原文:Fred would have paid twice as much as he did for his car if the salesman had insisted as he really needed a car. How much did Fred pay for his car?
A.
He paid half the price the salesman asked.
B.
He paid twice as much as the salesman asked.
C.
He paid the price the salesman asked.
D.
He needn't have paid that much for the car.