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【多选题】
如图所示，a、b分别表示先后从同一地点以相同初速度做匀变速直线运动的两个物体的v－t图象，则下列说法正确的是（）A.
4s末两个物体速率相等
B.
5s末两个物体速率相等
C.
4s末两个物体相遇
D.
5s末两个物体相遇
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【单选题】There is frequently a great interval between knowing how to solve a problem and______the resources to solve it.
A.
how to get
B.
to get
C.
get
D.
getting
【单选题】Could you please tell me _____ ? [ ]
A.
how to solve the problem
B.
what to solve the problem
C.
how solving the problem
D.
what solving the problem
【简答题】How small development schemes can help to solve the problem.
【简答题】How to Solve the Rubbish Problem in Cities?
【单选题】In deciding _____ a course of action，the candidates tried to estimate its likely impact on the voters .
A.
what to pursue
B.
which to pursue
C.
whether to pursue
D.
if to pursue
【简答题】化学起源于人类的生产活动，推动了人类文明的进步． （1）下列工艺过程与化学有关的是______． A．制造火药B．粮食酿酒C．烧制瓷器D．冶铁炼钢 （2）我国商朝的司母戊鼎用含铜84.77%、锡11.%、铅2.79%的青铜铸成，从物质的分类角度看，你认为司母戊鼎属于______（填“纯净物”或“混合物”）． （3）干旱地区可用人工降雨缓解灾情．人工降雨有多种方法，其中一种为利用高炮，将碘化银炮...
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