T12中的12指的是含碳量为（）。

[单选题]T12中含碳量平均为（）A .12%B .0.12%C .1.2%D .0.012%

[问答题] T8、T12为碳素工具钢，其含碳量分别为多少？

[单选题]T12A是指平均含碳量为（）的碳素工具钢。A . 1.2%B . 12%C . 0.12%D . 2.2%

[单选题]T12的含义是碳的质量分数为（）工具钢。A .0.12%的碳素B .1.2%的合金C .0.12%的合金D .1.2%的碳素

[单选题]牌号为T12A的材料是指平均含碳量为（）的碳素工具钢。A .1.2%B .12%C .0.12%D .2.2%

[单选题]T12钢碳的质量分数平均为（）A . 0.12%B . 1.2%C . 12%D . 1%～2%

[单选题](T12)A．PROPERTYB．RUNC．ON A.ALL OTHER FORMS OF TOBACCO(T7)______SCHOOL GROUNDSB．IF THEY"RE ON SCHOOL(T8)______C．SMOKERS ARE BEING(T9)______NOT JUST OUT OF SCHOOL BUILDINGS AT MANY COLLEGES,(T10)______BUT OFF THE PREMISES.ON NOV.19,THE UNIVERSITYOF KE

[单选题](T12)A．DEFENDINGB．UPC．COPE A.KEEP LIVING(T7)______TO THAT IMAGEB．IF YOU CAN(T8)______WITH THREE DAYS RUNNINGC．WAYS OF(T9)______AN IDEA WHAT YOU DESCRIBE IS A HABIT OF LYING THAT IS MORE SERIOUS THAN THIS.I SUSPECT THAT THELIES YOU TELL ARE(T10)______

[单选题](T12)A．WARNB．AWAYC．OUT A.MEN AND ANIMALS MIGHT SOON DIE(T7)______B．THEIR HANDS WERE BURNT(T8)______C．FEAR WOULD NOT(T9)______IT TO KEEP AWAY FROM THE FIRE FEAR AND ITS COMPANION PAIN ARE TWO OF THE MOST USEFUL THINGS THAT MEN AND ANIMALS POSSESS, IF

[单选题](T12)A．POSITIVEB．BEHINDC．RESULT A.AFRAID THEIR COUNTRIES WILL BE LEFT(T7)______B．WHAT WAS LESS VISIBLE THEN, HOWEVER, WERE THE NEW,(T8)______FORCESC．AS A(T9)______ A GREAT DEAL OF ATTENTION IS BEING PAID TODAY TO THE SO-CALLED DIGITAL DIVIDE—THE DIVI