人工加速老化性能测试的结果与实际自然结果有差异。()
参考答案:对
一个等差数列前12项的和为354,前12项中偶数项的和与奇数项的和的比为32:27,求公差d.
用所给词的适当形式填空。
1. The family goes shopping ______ (two) a week.
2. Lucy has a ______ (stomach) today. So she goes to see the doctor.
3. Tom and Jim ______ (play) soccer on the playground now.
4. It's important to eat ______ (health) food
5. Our teacher is ______ (friend) to us.
6. Look! Nancy isn't reading. She ______ (write) a letter.
7. I am ______ (stress) out because my English isn't improving.
8. He ______ (play) the guitar every day.
9. It's a beautiful ______ (sun) day.
10. Can you stop ______ (come) here, Kate? I need your help