每年夏秋季节，从我国东南沿海登陆，带来狂风暴雨的天气，用符号表示为（ ）
A．
B．
C．
D．
表示霜冻；
表示大雾；
表示台风；
表示冰雹．
故选：C．
如图所示的电路中，已知电源的电动势E=3.0V，内电阻r=1.0Ω，电阻R=3.0Ω．已知连入的电压表为理想电压表．当闭合开关S后，电压表的示数为（ ）
A．2V
B．2.25V
C．2.5V
D．3.0V
请根据以下情景，用英语给马杰写封建议信。词数100左右。
Your best friend Ma jie is an outstanding basketball palyer in our school team, but now he is faced a problem. His parents require him to spend more time improving his grades. However, he has to spend more time working on his basketball skills. So, he doesn’t know how to solve the problem. He wants you to give him some advice.
