常用的局麻药物,属于酯类的是
【单选题】
两个正、负电荷周围电场线分布如图所示。P、Q为电场中两点,则( )。

A.
正电荷由P静止释放能运动到Q
B.
正电荷在P的加速度小于在Q的加速度
C.
负电荷在P的电势能高于在Q的电势能
D.
负电荷从P移动到Q,其间必有一点电势能为零
参考答案
参考解析
【单选题】
What is the teacher doing in terms of error correction?
T: Does any of you have a pet at home?
S:I have dog at home.
T: Oh, I see you have a dog at home. Is your dog big or small?
Helping students do self-correction.
Indirect correction.
Tolerating correction.
Encouraging students to do peer correction.
【单选题】
患儿,男,3岁,因易汗出1个月前来就诊。症见汗出,以头部、肩背明显,活动后加重,神倦乏力,面色少华,肢端欠温,平时易感冒。舌质淡,舌边齿印,苔薄白,脉弱。治疗首选方剂是
四君子汤
生脉散
玉屏风散合牡蛎散
参苓白术散
黄芪桂枝五物汤