已知两点电荷在同一处产生的电场分别为E1=-48.0<img src="https://zk.995w.com/lqwvjeImg/e0/e04d2e6f601b40b924346ca3037d8809.png">+60.0<img src="https://zk.995w.com/lqwvjeImg/04/045066b516663e93b62c4715edcf0291.png">v/m,E2=74.9<img src="https://zk.995w.com/lqwvjeImg/45/4507f0753deb60e62c81c09c666418f5.png">-124.9<img src="https://zk.995w.com/lqwvjeImg/04/045066b516663e93b62c4715edcf0291.png">v/m,则该处的电场强度为( )<br>·74.9<img src="https://zk.995w.com/lqwvjeImg/45/4507f0753deb60e62c81c09c666418f5.png">-48.0<img src="https://zk.995w.com/lqwvjeImg/e0/e04d2e6f601b40b924346ca3037d8809.png">v/m<br>·-74.9<img src="https://zk.995w.com/lqwvjeImg/45/4507f0753deb60e62c81c09c666418f5.png">+48.0<img src="https://zk.995w.com/lqwvjeImg/e0/e04d2e6f601b40b924346ca3037d8809.png">-184.9<img src="https://zk.995w.com/lqwvjeImg/04/045066b516663e93b62c4715edcf0291.png">v/m<br>·74.9<img src="https://zk.995w.com/lqwvjeImg/45/4507f0753deb60e62c81c09c666418f5.png">+48.0<img src="https://zk.995w.com/lqwvjeImg/e0/e04d2e6f601b40b924346ca3037d8809.png">-184.9<img src="https://zk.995w.com/lqwvjeImg/04/045066b516663e93b62c4715edcf0291.png">v/m<br>·74.9<img src="https://zk.995w.com/lqwvjeImg/45/4507f0753deb60e62c81c09c666418f5.png">-48.0<img src="https://zk.995w.com/lqwvjeImg/e0/e04d2e6f601b40b924346ca3037d8809.png">-64.9<img src="https://zk.995w.com/lqwvjeImg/04/045066b516663e93b62c4715edcf0291.png">v/m