In a syllable, the nucleus + coda constitute the sub-syllabic unit r__________.
In a syllable, the nucleus + coda constitute the sub-syllabic unit r__________.
There are three kinds of acronyms: ________acronyms, hybrid acronyms and syllabic acronyms.
There are three kinds of acronyms: ________acronyms, hybrid acronyms and syllabic acronyms.
Which of the following consonants is not a syllabic consonant? A: /m/ B: /n/ C: /l/ D: /r/
Which of the following consonants is not a syllabic consonant? A: /m/ B: /n/ C: /l/ D: /r/
These features of speech that involves more than single sound segments are called ____features, which mainly include syllabic structure, stress, tone and intonation.
These features of speech that involves more than single sound segments are called ____features, which mainly include syllabic structure, stress, tone and intonation.
Generally speaking, which two types can abbreviations be classified into?( ) A: Initials and acronyms B: Contractions and short forms C: Syllabic abbreviations and alphabetic abbreviations
Generally speaking, which two types can abbreviations be classified into?( ) A: Initials and acronyms B: Contractions and short forms C: Syllabic abbreviations and alphabetic abbreviations
对于络合滴定，下面关于酸效应系数正确的是（）。 A: lgα<sub>Y</sub><sub>（</sub><sub>H</sub><sub>）</sub>≤lgK<sub>MY</sub>－8 B: lgα<sub>Y</sub><sub>（</sub><sub>H</sub><sub>）</sub>≥lgK<sub>MY</sub>－8 C: lgα<sub>Y</sub><sub>（</sub><sub>H</sub><sub>）</sub>≤lgK′<sub>MY</sub>－8 D: lgα<sub>Y</sub><sub>（</sub><sub>H</sub><sub>）</sub>≥lgK′<sub>MY</sub>－8
对于络合滴定，下面关于酸效应系数正确的是（）。 A: lgα<sub>Y</sub><sub>（</sub><sub>H</sub><sub>）</sub>≤lgK<sub>MY</sub>－8 B: lgα<sub>Y</sub><sub>（</sub><sub>H</sub><sub>）</sub>≥lgK<sub>MY</sub>－8 C: lgα<sub>Y</sub><sub>（</sub><sub>H</sub><sub>）</sub>≤lgK′<sub>MY</sub>－8 D: lgα<sub>Y</sub><sub>（</sub><sub>H</sub><sub>）</sub>≥lgK′<sub>MY</sub>－8
下列材料的热导率λ正确的排列为（）。 A: λ<sub>木材</sub>＜λ<sub>钢铁</sub>＜λ<sub>混凝土</sub>＜λ<sub>纯铝</sub> B: λ<sub>木材</sub>＜λ<sub>混凝土</sub>＜λ<sub>纯铝</sub>＜λ<sub>钢铁</sub> C: λ<sub>混凝土</sub>＜λ<sub>木材</sub>＜λ<sub>钢铁</sub>＜λ<sub>纯铝</sub> D: λ<sub>木材</sub>＜λ<sub>混凝土</sub>＜λ<sub>钢铁</sub>＜λ<sub>纯铝</sub>
下列材料的热导率λ正确的排列为（）。 A: λ<sub>木材</sub>＜λ<sub>钢铁</sub>＜λ<sub>混凝土</sub>＜λ<sub>纯铝</sub> B: λ<sub>木材</sub>＜λ<sub>混凝土</sub>＜λ<sub>纯铝</sub>＜λ<sub>钢铁</sub> C: λ<sub>混凝土</sub>＜λ<sub>木材</sub>＜λ<sub>钢铁</sub>＜λ<sub>纯铝</sub> D: λ<sub>木材</sub>＜λ<sub>混凝土</sub>＜λ<sub>钢铁</sub>＜λ<sub>纯铝</sub>
如图所示事故树的最小割集为（）。[img=171x267]17d608e17919de1.png[/img] A: {x<sub>1</sub>,x<sub>3</sub>},{x<sub>3</sub>,x<sub>4</sub>},{x<sub>1</sub>,x<sub>4</sub>,x<sub>5</sub>} B: {x<sub>1</sub>,x<sub>3</sub>},{x<sub>3</sub>,x<sub>4</sub>},{x<sub>1</sub>,x<sub>5</sub>},{x<sub>2</sub>,x<sub>4</sub>,x<sub>5</sub>} C: {x<sub>3</sub>,x<sub>4</sub>},{x<sub>1</sub>,x<sub>5</sub>},{x<sub>2</sub>,x<sub>4</sub>,x<sub>5</sub>} D: {x<sub>2</sub>,x<sub>3</sub>},{x<sub>1</sub>,x<sub>4</sub>},{x<sub>2</sub>,x<sub>4</sub>,x<sub>5</sub>}
如图所示事故树的最小割集为（）。[img=171x267]17d608e17919de1.png[/img] A: {x<sub>1</sub>,x<sub>3</sub>},{x<sub>3</sub>,x<sub>4</sub>},{x<sub>1</sub>,x<sub>4</sub>,x<sub>5</sub>} B: {x<sub>1</sub>,x<sub>3</sub>},{x<sub>3</sub>,x<sub>4</sub>},{x<sub>1</sub>,x<sub>5</sub>},{x<sub>2</sub>,x<sub>4</sub>,x<sub>5</sub>} C: {x<sub>3</sub>,x<sub>4</sub>},{x<sub>1</sub>,x<sub>5</sub>},{x<sub>2</sub>,x<sub>4</sub>,x<sub>5</sub>} D: {x<sub>2</sub>,x<sub>3</sub>},{x<sub>1</sub>,x<sub>4</sub>},{x<sub>2</sub>,x<sub>4</sub>,x<sub>5</sub>}
直流并励电动机的电势平衡方程式可写成（）。 A: AE<sub>a</sub>=U+I<sub>a</sub>R<sub>a</sub> B: BE<sub>a</sub>=U-I<sub>a</sub>R<sub>a</sub> C: CE<sub>a</sub>=U+（I<sub>a</sub>+I<sub>f</sub>）R<sub>a</sub> D: DE<sub>a</sub>=U-（I<sub>a</sub>+I<sub>f</sub>）R<sub>a</sub>
直流并励电动机的电势平衡方程式可写成（）。 A: AE<sub>a</sub>=U+I<sub>a</sub>R<sub>a</sub> B: BE<sub>a</sub>=U-I<sub>a</sub>R<sub>a</sub> C: CE<sub>a</sub>=U+（I<sub>a</sub>+I<sub>f</sub>）R<sub>a</sub> D: DE<sub>a</sub>=U-（I<sub>a</sub>+I<sub>f</sub>）R<sub>a</sub>
对于基态氢原子来说，其原子核外轨道能级顺序是( )。 A: E<sub>1s</sub>＜E<sub>2s</sub>＜E<sub>2p</sub>＜E<sub>3s</sub>＜E<sub>3p</sub>＜E<sub>4s</sub>＜E<sub>3d</sub> B: E<sub>1s</sub>＜E<sub>2s</sub>=E<sub>2p</sub>＜E<sub>3s</sub>=E<sub>3p</sub>=E<sub>3d</sub>＜E<sub>4s</sub> C: E<sub>1s</sub>=E<sub>2s</sub>＜E<sub>2p</sub>=E<sub>3s</sub>＜E<sub>3p</sub>＜E<sub>3d</sub>=E<sub>4s</sub> D: E<sub>1s</sub>＞E<sub>2s</sub>=E<sub>2p</sub>＞E<sub>3s</sub>=E<sub>3p</sub>=E<sub>3d</sub>＞E<sub>4s</sub>
对于基态氢原子来说，其原子核外轨道能级顺序是( )。 A: E<sub>1s</sub>＜E<sub>2s</sub>＜E<sub>2p</sub>＜E<sub>3s</sub>＜E<sub>3p</sub>＜E<sub>4s</sub>＜E<sub>3d</sub> B: E<sub>1s</sub>＜E<sub>2s</sub>=E<sub>2p</sub>＜E<sub>3s</sub>=E<sub>3p</sub>=E<sub>3d</sub>＜E<sub>4s</sub> C: E<sub>1s</sub>=E<sub>2s</sub>＜E<sub>2p</sub>=E<sub>3s</sub>＜E<sub>3p</sub>＜E<sub>3d</sub>=E<sub>4s</sub> D: E<sub>1s</sub>＞E<sub>2s</sub>=E<sub>2p</sub>＞E<sub>3s</sub>=E<sub>3p</sub>=E<sub>3d</sub>＞E<sub>4s</sub>