皮皮学,免费搜题
登录
logo - 刷刷题
搜题
【单选题】
来源于木兰科的药材是?
A.
红花
B.
丁香
C.
菊花
D.
辛夷
手机使用
分享
复制链接
新浪微博
分享QQ
微信扫一扫
微信内点击右上角“…”即可分享
反馈
参考答案:
举一反三
【单选题】除需要与成人相同的8种必需氨基酸外,下面各种氨基酸婴儿所需的是
A.
赖氨酸
B.
酪氨酸
C.
精氨酸
D.
牛磺酸
E.
组氨酸
【判断题】测量电路电压的仪表叫做电压表,也称伏特表,表盘上有符号“V”。
A.
正确
B.
错误
【单选题】With the rapid development of the Internet, _______ communication is done by regular mail.
A.
less
B.
more
C.
little
D.
few
【简答题】What is pulse width?
【单选题】Attacking an increasingly popular Internet business practice, a consumer watchdog group Monday filed a complaint with the Federal Trade Commission, asserting that many online search engines are concea...
A.
special fees that Internet users were charged
B.
Federal Trade Commission
C.
Commercial Alert
D.
online search engines
【简答题】脉冲宽度调制(PWM,Pulse Width Modulation),简称( )。四个字
【单选题】测量电路电流的仪表叫做_____。
A.
电压表
B.
电流表
C.
欧姆表
D.
电表
【单选题】Attacking an increasingly popular Internet business practice, a consumer watchdog group Monday filed a complaint with the Federal Trade Commission(FTC), asserting that many online search engines are c...
A.
special fees that Internet users were charged
B.
Federal Trade Commission
C.
Commercial Alert
D.
online search engines
【简答题】What is the "pulse width modulation (PWM)" speed control principle for DC feed motion?
【简答题】pulse width
相关题目:
参考解析:
知识点:
题目纠错 0
发布
创建自己的小题库 - 刷刷题