问题
选择题
在建筑物顶部装有一竖直的避雷针,当带正电的云层接近避雷针并放电时,避雷针中( ) |
A.不会形成电流 B.会形成电流,方向向上 C.会形成电流,方向向下 D.会形成电流,方向不定 |
答案
答案:C
在建筑物顶部装有一竖直的避雷针,当带正电的云层接近避雷针并放电时,避雷针中( ) |
A.不会形成电流 B.会形成电流,方向向上 C.会形成电流,方向向下 D.会形成电流,方向不定 |
答案:C
从方框中选用合适的词并用其适当形式填空。
2. Sports World is a ____________ round up of what is happening in sports of CCTV5. 3. He is a strange man and hates to be like others, he always tries to do everything ___________. 4. Many people decide to move to Moon Town for ____________. 5. He jumps ____________ in our class. |