写出下列单词的过去式形式。1. is_________________3. sh

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问题填空题

写出下列单词的过去式形式。

1. is _________________
3. shine _________________
5. know _________________
7. grow _________________
9. give _________________

2. see _________________
4. follow _________________
6. teach _________________
8. put _________________
10. are _________________

答案

1. was 2. saw 3. shone 4. followed 5. knew 6. taught 7. grew 8. put 9. gave 10. were

选择题

下列现象与物态变化的联系正确的是[ ]

A．烧开水时冒的“白气”--汽化

B．夏天湿衣服晾干--升华

C．冬天早晨看到草上的霜--凝华

D．吃冰棒解热--液化

判断题

下降外特性的弧焊电源焊接电压随焊接电流增大而降低。