平面https:/img.zuoyebang.cc/zyb_443e7b4f4bf9228e9f1fec85132a95c9.jpg:2x+3y+4z+1=0 与平面https:/img.zuoyebang.cc/zyb_690f799d46d16e0cd2aba1edb9fb0e6d.jpg:2x+3y+4z+1=0的位置关系是 ( ) (A)重合(B)相交且垂直(C)平行 (D)相交且不垂直不重合

某天早 https:/img.zuoyebang.cc/zyb_8cea8f9e1e44fee4a53b84b1b8d04a09.jpg.9 点至晚 https

*(CO)=0.678 . https:/img.zuoyebang.cc/zyb_d7bd9e4c4e6bf8bf7c5501cba60ee7e8.jpg(x

... . 1-|||-1 https:/img.zuoyebang.cc/zyb_a148ede5fabdd95c53fd3b87a9e6b9b0.jpg+(

https:/img.zuoyebang.cc/zyb_24df32803a3cebb32658729b71b9ddf0.jpg:dfrac (1)(4):df

4-|||-https:/img.zuoyebang.cc/zyb_218762fe585dbabaa8e3f46957a71dcd.jpg 0 .-1 2-|

X=2 =0.3 , X=4 =0.5 ,则下列选项正确-|||-的是 ()-|||-A 当 https:/img.zuoyebang.cc/zyb_7f1da

(B) https:/img.zuoyebang.cc/zyb_f136f6e023bb215619f3c76c1be07936.jpggt 0. (C) ht

设总体X的概率分布为X 0 1 2-|||-P (theta )^2 https:/img.zuoyebang.cc/zyb_9a4dc435e7d9078a6

.https:/img.zuoyebang.cc/zyb_39fb1dd0e2e3f867277e49a796f675bc.jpg-9 试画出图示各构件的受力图

https:/img.zuoyebang.cc/zyb_c0fbf0d3ab9a0b30a20e47b6f2b25ba5.jpg-a-|||-C.α^2 D.