字符型变量以char类型表示,表示范围是( )。
A.0~65536
B.0~65535
C.0~32768
D.0~32767
参考答案:B
将通电直导线置于匀强磁场中,导线与磁场方向垂直.若仅将导线中的电流增大为原来的3倍,则导线受到的安培力的大小[ ]
A. 增大为原来的3倍
B. 增大为原来的9倍
C. 减小为原来的1/3
D. 保持不变
根据要求改写句子。
1. His baseball is under the table. (变为一般疑问句)
__________________________?
2. His dresser is near his bed. (变为否定句)
___________________________.
3. My keys are on the sofa. (对画线部分提问)
4. Mike is behind the door. (对画线部分提问)
5. Can you bring your books here? (肯定回答)
__________________________.