逐次逼近数字式电压表的基准电压可分为若干个小电压,二进制代码,称为()。
A.基准码
B.较高速
C.超低速
D.恒速
参考答案:A
A study shows that _______ a boarding school would help students cultivate (培养) their independence while being away from their parents.
A.attending
B.admitting
C.applying
D.admiring
矩形截面纯弯梁,材料的抗拉弹性模量Et,大于材料的抗压弹性模量Ec,则正应力在截面上的分布图为以下4种答案中的()。
A.A
B.B
C.C
D.D