单项选择。Thereare＿＿daysinaweek. A.four B.five, C.seven...
问题详情：单项选择。Thereare＿＿daysinaweek. A.four B.five, C.seven.【回答】C知识点：数词题型：选择题...
Choosethebestanswer（根据短文内容，选择最恰当的*）Afour-year-oldgirli...
问题详情：Choosethebestanswer（根据短文内容，选择最恰当的*）Afour-year-oldgirlislyinginthearmsofadoctor.Shehasjustbecomemotherless.Abombdestroyedherhomeandkilledhermother.EverydayweseepictureslikethisonTVorin...
Afour-wheeledrobot，knownasRover，hasbeentestedbyateamatS...
问题详情：Afour-wheeledrobot，knownasRover，hasbeentestedbyateamatSydneyUniversity．Itwasusedtomoveaherdofcowsfromafieldtoadairy(牛奶场)．Researcherswereamazedathoweasilycowsacceptedthepresenceoftherobot.Theywe...