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【判断题】
要制作的电压表,必须选用灵敏度高的磁电系测量机构。A.
正确
B.
错误
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举一反三
【单选题】Which of the following about phonological items is RIGHT?
A.
All the phonological items are not isolated from each other, but are of the equal importance.
B.
Generally speaking, sounds are equal to letters.
C.
English consonants can be classified according to the manner of articulation.
D.
Fluency is the most essential measurement of pronunciation.
【单选题】已知数列{a n }是各项均为正整数的等比数列，数列{b n }是等差数列，且a 6 =b 7 ，则有（ ）
A.
a 3 +a 9 ≤b 1 +b 10
B.
a 3 +a 9 ≥b 4 +b 10
C.
a 3 +a 9 ≠b 4 +b 10
D.
a 3 +a 4 与b 1 +b 10 的大小关系不确定
【单选题】Which of the following about phonological items is RIGHT?
A.
Generally speaking, sounds are equal to letters.
B.
English consonants can be classified according to the manner of articulation.
C.
Fluency is the most essential measurement of pronunciation.
D.
All the phonological items are not isolated from each other, but are of equal importance.
【简答题】已知S n 是等比数列{a n }的前n项和，S 4 、S 10 、S 7 成等差数列. (I )求证而a 3 ,a 9 ,a 6 成等差数列； (II)若a 1 =1，求数列{a 3 n }的前n项的积
【单选题】Which of the following about phonological items is RIGHT? ·
A.
English consonants can be classified according to the manner of articulation. ·
B.
Generally speaking, sounds are equal to letters. ·
C.
Fluency is the most essential measurement of pronunciation. ·
D.
All the phonological items are not isolated from each other, but are of the equal importance.
【简答题】活性污泥生长曲线各个时期的特点是什么?
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