Bourneville病的临床特征是_________、_________、_________。
参考答案:面部皮脂腺瘤;癫痫发作;智能减退
根据句意及首字母提示填写单词。
1. Those workers are planting trees a _____ the street.
2. I was l _____ and didn't know how to go back home.
3. People often save their money in the b_____ .
4. Look at the star. It can tell you the direction of the n _____ .
5. I didn't hear you just now. Please read it a _____ .
两个固定的等量异种电荷,在他们连线的垂直平分线上有a、b 、c三点,如图所示,下列说法正确的是
A.a点电势比b点电势高
B.a、b两点场强方向相同,a点场强比b点大
C.a、b、c三点与无穷远电势相等
D.一带电粒子(不计重力),在a点无初速释放,则它将在a、b线上运动