搜题请搜索小程序“爱下问搜题”
问题 单项选择题

为确诊该病例，首选的检查是

A．肝功化验
B．肝炎病毒血清学
C．血培养
D．肥达反应
E．肝胆脾彩超

答案

参考答案：C

写作题
请根据Richard和网友的对话内容完成信息，每空一词。
Richard: I'm crazy about basketball. I play basketball for 2 hours every day. My father doesn't allow me to
do so. I don't even want to talk to him.
Sunny: Playing basketball takes you too much time.
Fiona**: You should spend more time on your study,
Angel: I feel sorry for you and your dad. Don't argue with him. Anyway he loves you.
SuiirjjfN' Cool of and talk to him
AK 007: How about sending him a text message?
L@@K: Or, you can write him a letter to show your respect and love!
(=A Richard: Thanks, I will try writing a letter to him)
NameSuggestions on Richard's problem
Sunny Spend 1______ time playing basketball.
Fiona**Spend more time 2______ your study.
Angel3______ argue with your dad.
AK 007 Send him a teat 4______.
L@@K 5______ him a letter.
查看答案
问答题

如图所示，两块平行金属板M、N竖直放置，两板间的电势差U=1.5×103V，现将一质量m=1×10-2kg、电荷量q=4×10-5C的带电小球从两板上方的A点以V0=4m/s的初速度水平抛出（A点距两板上端的高度h=20cm），之后小球恰好从靠近M板上端处进入两板间，沿直线运动碰到N板上的B点．不计空气阻力，取g=10m/s2cy．求：

（1）B点到N板上端的距离L．

（2）小球到达B点时的动能EK．
查看答案