题目

Mr. Whitson taught sixth-grade science．In his first class，he gave us a __1__ about an animal called “cattywampus”，which died out during the Ice Age．He passed __2__ a skull （头盖骨）as he talked．We felt proud for feeling it，took __3__ and later had a quiz． When my paper returned，I was shocked at the big red cross through __4__ of my answers．Why? I had written down exactly what he said． Very simple．Mr. Whitson __5__．He had made up the story about the cattywampus．Needless to say，we were extremely __6__． We could have _7__ him out，he said．__8_，he told 16．某同学利用图示装置练习使用多用电表．（1）测所接电源的电动势E：将多用电表的选择开关旋到直流电压挡并选择适当量程，把开关S1打向a（填“a”或“b”），开关S2打向c（填“c”或“d”），读出并记下电表的示数，然后断开S1，和S2．（2）测定值电阻的阻值R（约为1000Q）：将多用电表的选择开关旋到欧姆挡的“×100”（填“×1”、“×10”、“×100”或“×lk”）挡并进行欧姆调零，把开关S1打向b，开关S2打向c （填“c”或“d”），读出并记下电表的示数，然后断开S1和S2．（3）测电阻R中通过的电流I：将多用电表的选择开关旋到直流“10mA”挡，把开关S1打向 a，开关S2打向d （填“c”或“d”），读出并记下电表的示数，然后断开S1和S2．