【单选题】The dentist could () no sign of decay in her teeth. ( )
【单选题】关于多用电表,下列说法正确的是 ( )
B.
如果多用电表的指针不在零刻度线,可以进行欧姆调零
【判断题】简笔画教学最为显著的特点为生动具体、形象直观。()
【单选题】以下关于MF47指针式万用表的叙述正确的是( )。
A.
欧姆量程为“200Ω、2kΩ、20kΩ、200kΩ、2MΩ、20MΩ”
C.
测量电阻前必须进行欧姆调零,且换一次档,调一次零。
【单选题】The dentist could _____ no sign of decay in her teeth.
【简答题】I___________whether the dentist could___________early___________.
【简答题】In the morning a very tired John rang the dentist and ______ an appointment to see the dentist. The receptionist told him that he could see the dentist next Thursday at 10 o’clock. When John asked for...
【简答题】In the morning a very tired John rang the dentist and asked for an appointment to see the dentist. The ______told him that he could see the dentist next Thursday at 10 o’clock. When John asked for an ...
【简答题】某学生用万用表欧姆档 R × 100 检测大容量的电容器的质量好坏情况如下,请分析结论。 (1) 、万用表的指针先向右偏转,再迅速返回起点。( ) (2) 、万用表的指针先向右偏转到最右端后不回归 ( ) (3) 、万用表的指针先向右偏,然后停留在刻度盘中间某处( ) (4) 、万用表的指针在零刻度处不动。( )
【单选题】用万用表测电阻有以下实验步骤,正确的次序是 1 、用两支表笔分别与待测电阻的两端相连; 2、将两支表笔相接触,调节欧姆档的零旋钮使指针在电阻刻度的零点; 3 、选择开关拨到欧姆挡的位置上并选择好量程; 4 、根据指针位置和所选量程读出数值。