【单选题】Writing is a slow process, requiring plenty of thought, time and effort。
【单选题】Writing is a slow process, requiring ______ thought, time, and effort.
【判断题】雄蕊和雌蕊多数,螺旋状排列是原始的性状。
【判断题】雄蕊和雌蕊多数,螺旋状排列是原始的性状。
【简答题】Writing is a slow process, requiring ________ thought, time, and effort. A) significant B) considerable C) enormous D) numerous
【单选题】Read "Zhaozhou Qiao" and complete the following statements by choosing the proper answer from A, B, C and D. Zhaozhou Bridge leads the word in bridge construction because of its being .
A.
the longest symmetrical arch bridge
B.
the oldest stone-arched bridge
C.
the oldest open-spandrel bridge
D.
best-proportioned bridge
【单选题】关于叠加原理的应用,下列叙述中错误的是( )。
A.
对含有受控源的电路,在应用叠加原理时,不能把受控源像独立源一样计算其响应。
B.
叠加原理只适用于计算线性电路的电压和电流,不适用于计算功率。
C.
各个响应分量在进行叠加时,只是在数值上进行相加,不必考虑各个响应分量的参考方向。
D.
应用叠加定理,当考虑电路中某一独立电源单独作用时,其余不作用的独立电源都要置零。
【单选题】Writing is a slow process, requiting ______ thought, time, and effort.
【单选题】Coal was formed out of dead forests by a long and slow().
【单选题】Writing is a slow process ,requiring ______ thought, time and effort.