皮皮学，免费搜题
登录
搜题
【单选题】
锯齿波触发电路中调节恒流源对电容器的充电电源,可以调节( )A.
锯齿波的周期
B.
锯齿波的斜率
C.
锯齿波的幅值
D.
锯齿波的相位
拍照语音搜题，微信中搜索"皮皮学"使用
参考答案：
参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【单选题】_________ is the only knight to have found the Holy Grail.
A.
Mordred
B.
Lancelot
C.
Galahad
【单选题】( ) 5. A. en ough B. r ough C. t ough D. th ough
A.
enough
B.
rough
C.
tough
D.
though
【单选题】关于埋弧焊的原理,下列说法不正确的是( )。
A.
埋弧焊的电弧是掩埋在颗粒状的焊剂下面的
B.
埋弧焊是靠焊丝引弧的
C.
埋弧焊的电弧保护方式是气渣联合保护
D.
埋弧焊都是自动焊
【单选题】The boss say to the secretary, “ If you work well, you _____ have a rise.”
A.
shall
B.
would
C.
must
D.
ought
【单选题】Which is NOT the reason for many people searching for the Holy Grail in the medieval ages?
A.
It could heal wounds.
B.
It could make people forever young.
C.
It could give people happiness.
D.
It could give people power to control the world.
【单选题】It is wise to remember that you do not have to buy anything from any salesperson. You ought to buy only those things you really need or want and can【76】. Try not to let your personal feelings about th...
A.
afford
B.
find
C.
possess
D.
gain
【单选题】What does the phase 'the holy grail'(Line 4, Para.7)probably mean?
A.
Chalice used by Christ at the last supper.
B.
The object of any prolonged endeavor.
C.
The thing that people can rarely get.
D.
The thing that people feel proud of.
【简答题】A. enough B. rough C. tough D. though
相关题目：