2.比较温度的高低。-|||-^circ Cbigcirc (5)^circ C-|||-^circ Cbigcirc -(2)^circ C-|||-^circ Cbigcirc (-)(7)^circ C-|||-https:/img.zuoyebang.cc/zyb_7cc1afcaa3c450c54436c73901f93a27.jpg^circ Cbigcirc (0)^circ C-|||--(2)^circ Cbigcirc (-)(5)^circ C-|||-^circ Cbigcirc (-)(9)^circ C-|||--(15)^circ Cbigcirc (-8)C-|||--(16)^circ C ○9℃-|||--(20)^circ C ○10℃

^circ +(25)^circ =-|||-^circ +(81)^circ =-|||-^circ +(140)^circ =-|||-^circ -(25

^circ -dfrac (4)(2)-|||-:^circ +dfrac ({varphi )^1}(2) D. ^circ -dfrac ({varphi

2.已知:如图,在 Delta ABC 中, angle BAE=angle CAE angle ADC=(90)^circ angle B=(40)^cir

用最小分度为(0.2)^circ C的水银温度计,测量温度一次,测得结果为(0.2)^circ C,其绝对误差为( )(0.2)^circ C。A.(0.2)

画下面各角。-|||-^circ -|||-^circ -|||-^circ

sin (20)^circ cos (10)^circ -cos (160)^circ sin (10)^circ =-|||-()-|||-

设A，B为n阶方阵,下列命题哪个不正确的是( )A .A 可逆，则 ^circ 可逆 B^circ C ^circ D ^circ设A，B为n阶方阵,下列命题

一铝制空心球,内径40mm,外径80mm,内外壁温度分别为^circ C(50)^circ C,外壁覆盖一层导热系数为^circ C(50)^circ C的保温

15.在一逆流套管中,冷,热流体进行热交换。两流体的进出口温度分别为 _(1)=(20)^circ C ,_(2)=(85)^circ C ,-|||-._(1

_(2)xrightarrow ({S)_(2)OP}(l)_(3)=(27)^*C-|||-已知: _(s)=1021kJcdot k(g)^-1(t)_(0