【单选题】国际上通常把60岁以上人口占总人口比例达到10%,或65岁以上人口占人口比重达到7%作为国家或者地区进入老龄化社会的标准。下图为西宁地区示意图,表为“青海省2000年和 2010年人口数据”。 读图和材料完成下面小题 11.青海省人口变化对其经济发展的影响正确的是
【简答题】对于大多数中国人来说,节假日期间景区人山人海,高速公路、城市道路拥堵 ( congestion) ,是促使他们家中度假( staycation )的两大主要原因。
【判断题】支路电流法在列写KVL方程时,对回路的方向的选择必须都是顺时针。A. √ B. ×
【单选题】对于大多数中国人来说。节假日期间景区人山人海,高速公路、城市道路拥堵,是促使他们家中度假的两大主要原因。
A.
For most Chinese people,the crowds of scenic spots and avenues and city roads during the holidays are the two main reasons for their vacation at home.
B.
For most Chinese,during holidays and festivals, the scenic spots are full of people, highways, urban road congestion, are the two main reasons to promote their home vacation.
C.
For the majority of Chinese people,overcrowded tourist sites,congestion on expressways and city roads during holidays are the two major factors contributing to their staycations.
D.
For most Chinese people, during the holidays, there are a large number of people in the scenic area, and the congestion of expressways and urban roads are the two main reasons for their holiday at home.
【简答题】对于大多数中国人来说,节假日期间景区人山人海,高速公路( express way )、城市道路拥挤( congestion ),是促使他们家中度假( staycation )的两大主要原因。
【判断题】支路电流法在列写KVL方程时,对回路的方向的选择必须都是顺时针。
【判断题】支路电流法在列写KVL方程时,对回路的方向的选择必须都是顺时针。
【单选题】支路电流法在列写KVL方程时,对回路的方向的选择是( )。
【判断题】含有理想电流源的支路,列写支路电流法方程时,理想电流源所在支路电流为已知量,可以减少KVL方程个数,选回路时避开理想电路源所在支路。