【简答题】A.Because it has plastic wheels. B.Because it has plastic tires. C.Because it has a plastic frame. D.Because it has no metal parts.
【判断题】___ The lathe has two abrasive wheels.
【单选题】A tricyle has _____ WHEELS.
【单选题】______ I can see, the two wheels which are supposed to turn round do not turn atound.
【简答题】There are ___ wheels on the step. Two wheels are directly installed on the ____, which are called auxiliary wheels. The other two wheels are installed on the step chain to make the step and the step c...
【单选题】如下图所示,利用直流通断法来判断同名端正确的是
C.
在开关K闭合或者断开一瞬间电流表的读数是一致的
【单选题】如下图所示,利用直流通断法来判断同名端正确的是
【单选题】Thomas ________ the army for two years,so he misses his mother very much.
【单选题】____ it got four wheels? [ ]