【单选题】10 years ago, _________ only one classroom building in our school. And in 10 years, _________ five classroom buildings in our school.
A.
there will be, there are
B.
there was, there will be
C.
there will be; there was
【判断题】抢救触电者时,要首先把触电者拉到安全地点。()
【判断题】In ten years, the grain consumption of our town decreased with 20%.()
【单选题】药物中氯化物杂质检查,是利用Cl-在酸性溶液中与硝酸银作用生成氯化物浑浊,所用的酸是()
【单选题】Our town has been added to these years. It is no longer ________ it was 15 years ago, ________ it was poor and untidy.
【单选题】Our teacher ____ in our school for 29 years and he ____ here when he was 23 years old.
【单选题】When did For Our Kids begin?
【简答题】如图所示电路中,方框代表电源或电阻,各支路上电流的参考方向如图所示,则I1=( ),I2=( )。
【单选题】No one knows what _______ in fifty years.
【简答题】如图所示的电路,求电流i 1 和i 2 。