Which of the following picture shows the tongue position of the sound of [ŋ]?
A: [img=222x186]180371a4a602a03.png[/img]
B: [img=245x187]180371a4b384fd3.png[/img]
C: [img=239x220]180371a4c27acb3.png[/img]
D: [img=238x219]180371a4ce53129.jpg[/img]
A: [img=222x186]180371a4a602a03.png[/img]
B: [img=245x187]180371a4b384fd3.png[/img]
C: [img=239x220]180371a4c27acb3.png[/img]
D: [img=238x219]180371a4ce53129.jpg[/img]
举一反三
- Which of the following propositions is false,set A = {x,x is an integer and[img=60x23]1803a1c6eebb7a3.png[/img]} ? ( ) A: [img=113x25]1803a1c6f77ce06.png[/img] B: [img=139x25]1803a1c7001fe79.png[/img] C: [img=51x22]1803a1c70863f61.png[/img] D: {x|x is an integer and |x| 4}[img=33x22]1803a1c711a7c63.png[/img]
- Which of the following propositions is false,set A = {x,x is an integer and [img=60x23]1803a1c503ffa04.png[/img]} ? ( ) A: [img=113x25]1803a1c50cc3162.png[/img] B: [img=139x25]1803a1c514e60ea.png[/img] C: [img=51x22]1803a1c51dd52ef.png[/img] D: {x|x is an integer and |x| <4} [img=33x22]1803a1c525cf1bd.png[/img]
- 设[img=127x53]17f1b3d6db98b83.jpg[/img]，f（x）=arctanΧ，则[img=56x55]17f1b3d82842941.jpg[/img]=（）。 A: π B: 3π/4 C: -3π/4 D: 2π
- 求不定积分[img=115x46]17da65382f8e1b9.png[/img]； （ ） A: x - (5*log(x + 1))/4 - (3*log(x - 3)) B: (5*log(x + 1))/4 - (3*log(x - 3)) C: x - (5*log(x + 1))/4 - (3*log(x - 3))/4 D: (5*log(x + 1))/4 - (3*log(x - 3))/4
- 设随机变量X~N(-3，[img=16x22]1803bbe3375949b.png[/img])，则D(X)=4 .